Mercury thunderbolt ignition. The Thunderbolt system does not use points.

Mercury thunderbolt ignition There are 3 main components to your ignition system. Put grease on the splines of the DS before replacing LU back on the motor, do not put grease on the top of the DS. I have owned several of these ignision packages over the years. I'm currently using the Mercury Thunderbolt IV distributer that came with the boat. Your ignition fires when the points are closed I believe. Use fresh gas. I need some info on what wires carry battery voltage to switch box if any. after many hours of testing and rewiring, I have found that I can get it to run on the #1 cylinder if i disconnect the power to the #2 coil. 84 $0. P. Kraftsman New member. The system is made up of a high-power electronic ignition coil, an ignition At the heart of Mercury Thunderbolt Ignition is a series of high-energy coils that deliver a powerful spark to ignite the fuel mixture in the engine. This upgrade is simpler than a Thunderbolt V upg In 1970 it got the first "thunderbolt" ignition system - the "thunderbolt 2 - Phase Maker". Here is the youtube location to where Sierra 18-5186 Ignition Coil Sierra 18-5186 Ignition Coil is a replacement part for use on Mercury, Chrysler and Force Outboard engines. MerCruiser 5. This motor was laid up in my garage for about 4 years and I recently tried to restart it. Part number:300-8M0079202 (This part supersedes part numbers:392-805570A2,392 Hey all, total boat newb here that just acquired a 197X Switzer Craft 16' with a Mercury 1150 (115hp) thunderbolt ignition 6 cyl inline engine. It consists of two main components: the spark plug and the coil. BLUTOKS Thunderbolt Ignition Coil Compatible with Mercury Marine Mercruiser 4. Setting Timing on Thunderbolt IV, not V- Question. Nov 14, 2017 Thunderbolt is a label that Mercury put on many different ignition styles. The wiring diagram for the Mercruiser Thunderbolt ignition system provides a visual representation of how the different components are connected. com; Toggle menu. 5 with Thunderbolt ignition question g'day, very late reply, you've probably got the thing off by nowor hurled it somewhere but on my early 70's blueband 7. I'v always liked the simplicity of Mags but with just about everything discontinued from Mercury, Oldmercs is the only supplier, and those prices are scary. Might have to rebuild and clean the carb. This is a complete working ignition system that was removed from a GM V-8 engine with the Thunderbolt 4 ignition system. How Do I troubleshoot my Mercruiser Thunderbolt Ignition? Mercury Service Bulletin 92-11 Mercury MerCruiser Sterndrives & Engines . 1978 7. Post by sodak » Fri Nov 06, 2015 9:02 pm. Mercury 402 2 Stroke Outboard No Spark Ribnet Forums. littleheuey New member. 8 HP) outboard with a thunderbolt ignition. Thunderbolt Iv And V Simularities Differences Gctid703485 Bayliner Owners Club One motor is a 1998. Does so using an actual Thunderbolt was a general name for the mercurys ignition system that covered many years and styles. Toggle menu. D. Hard to splice but sometimes doable. The other is a 2004. The spark plug is connected to the coil, which is then connected to the ignition system. Replaces: Mercruiser Stern Drive 805185A36, 805185A26, 805185A16, 805185A6, 805185A43, 90747A27, 90747A25, 90747A21, 90747A3, 862057A4. This is a genuine Mercury Marine factory OEM part, not aftermarket 1976 mercury 650 Wthunderbolt ignition. Welcome to PowerBoatSupply. I've learned a ton from this site over the years and am hopeful some info I gathered might be useful to others. Background: A few of years ago I bought a The Mercury Thunderbolt Ignition system has revolutionized the world of internal combustion engines. Customer: i have an old mercury thunderbolt ignition 85 hp motor serial #(###) ###-#### ***** idea of year and or value? it ran great 7 years ago. Thread I grabbed my mercruiser manual and went thru the thunderbolt ignition troubleshooting flow chart basically ended up at bad ignition module :facepalm: Before shelling out 600 bucks (more than I paid for my boat), is there anything else worth I've got a thunderbolt IV ignition with the v8-24 module. 99 Mercury MerCruiser Sterndrives & Engines . 13 $73. It is a very powerful and reliable ignition system. In 1974, while still called the Model 110 it got Merc's Thunderbolt 4 ignition which stayed in production as Merc's near All About the Mercury 650 Thunderbolt Wiring Diagram When it comes to wiring diagrams, Mercury's 650 Thunderbolt may be one of the most important electrical diagrams of all. sodak. Kit includes coil wire. My 2. Mercury - Mercruiser 10-90926 Ignition Distributor Screw. important_devices: Order online, get free downloads* important_devices: Order online, get free downloads* IGNITION MODULE ASSEMBLY (1 required per assembly) 336-4516A 2 - Ignition Module, NLA, Core charge of $35 will be added [ More info] Unavailable #4: 10-59800 Re: Mercruiser Thunderbolt V ignition problem? OMG!! This boat is REALLY new to me, I didn't even do the buying checkout myself (and my son didn't mention it). At the heart of Mercury Thunderbolt Ignition is a series of high-energy coils that deliver a I just bought an older, but decent shape, flatbottom that came with a 20hp The Mercury Thunderbolt Ignition is an advanced electronic ignition system specifically designed for outboard and stern drive engines, providing unprecedented power and performance. The Thunderbolt system does not use points. The stator, which is one unit but modular, is made up of low speed coils, high speed coils and a capacitor. 1,406 Satisfied Customers. The 174-336 stator can be tested directly with a voltmeter If you see at least 400V it’s probably good. Buy a genuine Mercury Quicksilver or aftermarket part. 3L 5. important_devices: Order online, get free downloads* important_devices: Order online, get free downloads* BOOT, IGNITION COIL (2 required per assembly) 332-2854 - Boot - Priced Individually [ More info] $3. outboard motor with the Thunderbolt ignition. First of all, I know virtually nothing about I thought it would be useful to post a few of my learnings on the 1971 Mercury 7. 5 mercury with thunderbolt ignition 1973 model<br />Put new water pump in and change the lower unit lube. Mercruiser introduced the Thunderbolt With its advanced engineering and cutting-edge design, Mercury Thunderbolt Ignition set a new standard for outboard motors. i just worked on my engine with this same ignition system i jst had a bad coil, these are decent ignition systems they can operate over long periods of time without tune up or repair as the manual claims, i feel personally its a strong system, as long as the 4. Mercury outboard motors Nissan outboard motors Suzuki outboard motors Tohatsu outboard motors Yamaha outboard motors . Meets or Exceeds SAE J1171 Standards. Mercury outboard (Thunderbolt Ignition) recently. important_devices: Order online, get free downloads* Flywheel, Ignition Coil & Switch Box; Gear Housing Assembly, Complete (Serial Group Re: Mercury 7. Re: What year is my 7. It shows the wiring The Thunderbolt Ignition system was designed by Mercury Marine. The resistance test on Mercury ignition coils isn’t a perfect test of goodness. check the shifting slide bar for cracks or broken slide. want to replace thunderbolt iv ignition system if I did the thunderbolt IV ignition system test and I had no voltage on the red/white lead at the distributor so it lead me disconnecting the wht/red from terminal and then testing that lead and still had no voltage. Free shipping over $99 Need help? Reach us at 877-388-2628 or sales@wholesalemarine. ThunderBolt is often refered to as TB in the IV or V versions. 8 serial # 2934998 outboard off of CL. Was out running around the lake yesterday and everything was fine until I had to navigate through a small connecting channel that had debris on the bottom (stumps and such). 8 KMPo ciągłym i silnym strumieniu można rozpoznać stan silnika i jego pompy wody. At what rpm is the advance all the way in so I can check my total timing? Go. 0 out of 5 stars 121 2 offers from Skrócona instrukcja obsługi i uruchomienia silnika zaburtowego Mercury 9. 0L 5. 7 Thunderbolt V. S Coast Guard Approved and has the official marine SAE J1171 stamp on the bottom of the distributor. Also check for loose or frayed wires. 5 hp Thunderbolt Ignition Thanks for the reply! I am getting spark to the No. I have an old mercury thunderbolt ignition 85 hp motor serial # 4099213 any idea of year and or value? it ran great 7. Thunderbolt V Question Club Sea Ray. This HEI distributor/coil kit will sufficiently fulfill The Thunderbolt IV ignition module can be a valuable upgrade for boat owners looking to enhance their engine’s ignition system. The 1998 has an ignition module bolted on the exhaust manifold. <br /><br /> web page EDIT: I now sell complete Delco EST ignition kit upgrades to replace the aged and failing Mercruiser Thunderbolt ignition systems. Compatible with Mercruiser GM V6, V8 308 & 350 Engine With Thunderbolt IV & V Ignition System - Only works with HEI (High Energy Ignition) Systems and will not work with Point Ignition Systems. 8 that was missing the ignition when I bought it, so I found a whole power-head with ignition from a 1972 model on ebay and put all the ignition parts on mine. 8 model 110 thunderbolt points replacement I just finished rewiring my 1972 Model 110 9. All of our Mercury parts are sold and priced EACH. dde428 New member. The service replacement Thunderbolt V® Ignition Control Module (ICM) is no longer available through Mercury Marine. It senses detonation (pinging) and adjusts the timing until the advance is the best w/o pinging. Inboard & Sterndrive Engines Re: Mercury 850 Thunderbolt re: Wiring Diagram According to my information that motor is a 1974 Model. It's a key part of Mercury Identifying the Type of Thunderbolt IV Module Original Thunderbolt IV ICM This module is mounted on the exhaust elbow and has an aluminum housing. Fits all GM based engines with Thunderbolt ignition systems from early 1980's and newer Quicksilver 802893Q01 Water Separating Fuel No spark condition. 1988 I replaced ignition coil and I still have no spark. Switch it to the delco voyager and forget about it. $9. When I take this green wire and connect it to the other coil, I do get spark to that plug. Reply. Replacement Thunderbolt IV ignition control modules (ICMs) no longer come with the adapter harness (15275A1). Home. (electronic spark timing) This has been borrowed from another boating forum. Distributor sensor 892150Q02 is for use with V6 and V8 MerCruiser engines made by General Motors using Thunderbolt IV and V ignition systems. It is a 1970 115 mercury thunderbolt ignition. For some reason, Mercury used aluminum coated or aluminum wires in these years which corrodes. Re: 1971 Mercury 500 50HP Thunderbolt Ignition Work the control and make sure that you have put the cables back on the correct positions and have not reversed them. 7L 305 350 V6 V8 392-805570A2, 18-5438, 392-7803A4. How would I trouble shoot the ingnition module (they are expensive). it seems to turn over ok but it hasn't got spark so it won't run. tambo rebel New member. It's getting fuel and compression is good but it seems to have a weak/intermittent At first glance, the Mercury Thunderbolt Ignition might seem like just another marine engine. You need to be careful with that ignition because the stators are expensive and easily damaged. - Mercury 339-5287 - Mercury 339-6222A1 - Mercury 339-6222A4 - Mercury 339-6222A6 - Re: 1972 Mercury 200 20 HP Ignition question you have a phase maker system with points, thunderbolt ignition. Mechanic's Assistant chat. Mercury Kiekhaefer Thunderbolt Ignition Medallion 9 5 L X 25 W Southcentral Outboards. Full 12V coil (no resistor) Magnetic sensor in distributor (no points or advance weights) and an amplifier/advance control usually mounted on the port-side exhaust elbow. Second-Generation Thunderbolt IV Ignition Control Module This module is mounted on The legacy Thunderbolt V MerCruiser ignition control module (ICM) used as a service replacement for Carbureted MerCruiser Thunderbolt V and Thunderbolt IV ignition modules is not available. 54 In Stock #6: 87-91019A 6: General Q & A - Mercury thunderbolt IV ignition advance module question - I just put a new 502 in a 1989 Switzer SS240. Bad ignition module - 5. By following the correct wiring diagram and replacing other ignition components, boat owners can ensure Mercury 20hp 200 Thunderbolt Ignition. Replacement Inboard Ignition Coil - Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI - Replaces 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511. Mercruiser Ignition Module Perfprotech Com. important_devices: Order online, get free downloads* E11-0005 - Ignition Sensor Thunderbolt [ More info] $76. Mercury thunderbolt ignition 85hp. Horse-power. Mercury Outboard general discussion. important_devices: Order online, get free downloads* important_devices: Parts for Mercury Marine 7. Crank the engine and carefully tap the jumper to engine ground, if the coil fires – check the points and points wires. Sierra 18-5403 Rotor Replaces 392-9089T. took it off due to age and condition of my old boat Re: Thunderbolt IV Ignition Amplifier/Module There is no point in keeping the TB4 system once it has let go. Mercruiser Thunderbolt ignition systems. Hi, I am new to this forum, I have a 1967 mercury 110 9. Joined Jul Amazon Music Stream millions of songs; Amazon Ads Reach customers wherever they spend their time; 6pm Score deals on fashion brands; AbeBooks Books, art & collectibles In 1970 it got the first "thunderbolt" ignition system - the "thunderbolt 2 - Phase Maker". When accelerating, the ignition module may add more spark advance to the “Base Spark Timing Curve”. when put into forward it goes in kind of hard like a rough car tranny and when the throttle is pushed all the way forward the motor does not rev up with it unless the throttle is 'jerked' slightly forward and back and still doesnt reach what i would think is 'wide Mercury MerCruiser Sterndrives & Engines . Mercury Mercruiser Mcm 4 3l Bravo Efi Alpha 3lh Service Manual Manualzz Fits MCM (sterndrive) & Tow Sports 5. 5 HP Ignition Components. They are not fuel injected and have carburetors. This diagram is a valuable tool for anyone looking to understand the workings of Mercury's 650 Thunderbolt ignition system and how its components function together. Whitecap36. 5 the catch is at the front on the right hand side, just to the right of the choke, it has a "plastic" lever that protrudes through the bottom of the lower cowl/ housing, How Mercruiser Thunderbolt Ignition Systems Work Boating Forum Iboats Forums. Mar 29, 2011 #1 Hi guys, I'm new to the forum and new to boat ownership. Hi, I picked up a new to me motor this week. 1 ignition module wiring harness NSS . In 1979 it simply became the 9. The ignition part of gthe module is the same, however, the V uses a timing module. Thread starter Kraftsman; Start date Mar 29, 2011; K. I have the Seloc online repair manual and it dont tell me BLUTOKS Thunderbolt Ignition Coil Compatible with Mercury Marine Mercruiser 4. This is the part that fits in the distributor with a slot that the rotor disc runs in, correct? Mercury Part Hello, I just got an old 1970 Mercury 110 9. Bry21317 Chief Petty Officer Thunderbolt IV Ignition Timing 1. Apr 26, 2006 #1 I receantly reciived a 1976 me I receantly reciived a 1976 merc 650 65hp. 7l gm 350 v-8 1988-1995 distributor and ignition components parts. Year. It has a Thunderbolt II "Phase Maker" ignition system. 5 Thunderbolt Ignition. com FREE In most cases, an electronic triggering ignition system can be added. Dec 2, 2012 #1 hi i recently purchase a boat with a mercury thunderbolt ignition 85hp outboard. For 6 cylinder engines with Thunderbolt ignition systems. 8 blocks from 1968-1972. 5 HP Ignition Components; Parts for Mercury Marine 7. The points - in this case they "close" to pass on the power stored in the capacitor and, the ignition coil. Do date a Mercury by serial # try the This is an excellent replacement kit for "points" distributors and faulty MerCruiser Thunderbolt ignition systems. 3L Thunderbolt V ignition issue -mercruiser-thunderbolt-ignition-systems-work Chris. Disconnect the points wires from the ignition coils and connect a jumper wire to the negative side of the coils. Use as a points replacement kit or change your current electronic distributor. Designed as a direct replacement for Mercury Thunderbolt IV Ignition Distributors. I didnt know much about mercs because now i run a johnson, so I didnt know much about what to look for. 5/9. Thread starter tambo rebel; Start date Dec 2, 2012; T. I have a diagram for a 1975 850 which may be the same. Developed by the renowned manufacturer, Mercury Marine, this ignition I have a 1973 mercury 850 thunderbolt ignition it has a distributor but no points and the cdi box has 4 wires on 1 side. Serial Number Range. All Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. 7L 305 350 V6 V8 392-805570A2, 18-5438, 392-7803A4 2 Pack Mercury Ignition Coil Sierra 18-5186 Ignition Coil Mercury In this video I show how to upgrade a Mercruiser Thunderbolt IV ignition system to a new Delco EST ignition. I believe it has thunderbolt ignition, or at least it say thunderbolt on the plug wires. Now that I have it home I noticed that the distributor says motorcraft on it. The coil produces a high voltage current, which Sierra Marine Thunderbolt IV HEI Distributors. Does your motor have the distributor ignition? 1976 models went to the CDI ignition which I also have the diagram for. In 1974, while still called the Model 110 it got Merc's Thunderbolt 4 ignition which stayed in production as Merc's near perfect ignition until 2005 when most 2 strokes were discontinued. 5 h. Thread starter littleheuey; Start date Apr 26, 2006; L. I think it was under $8 in wire if I remember correctly, plus a few dollars for the new terminals for the wires. While I was lying on the floor reinstalling the ignition switch, I noticed an on/off switch on a bottom left corner of the little panel where the shifter mounts. While LU is off place garden Wht/Grn -Water Press/Flow Alarm or Indicator - ((Ignition module to Dist. 3 Engines with Thunderbolt I and IV ignitions 815407Q5 815407Q02 815407A2 4. $0. . Fits: GM V-8 Engines w/Thunderbolt IV & V Ignition. 8 h. The spark plugs are also coated with a special material that reduces fouling and extends Marine Electronic Ignition System. 5hp Thunderbolt restoration Picked up this old Mercury, no spark on either coil but compression of 165psi in both cylinders, I've not had time to look at it yet, I'm hoping it's the kill switch as on this model the switch breaks the ground not grounding the signal, if it's not that I guess it the stator or switch box, with Mercury - Mercruiser 87-892150Q02 Ignition Sensor Assembly, V-6 & V-8 with Thunderbolt ignition, Mallory 9-29804,Mercury 87-892150K02, Sierra 18-5116-1. 1 Module bracket 861516 . Run a 50:1 mix. Put a couple of tablespoons of TCW-3 oil in the spark plug holes and turn it over by hand a few times, before you run it. I am thinking that Mercruiser introduced their ThunderBolt IV ignition system in the early 80s. Hardin Marine Wiring Harness Engine. 32 10+ In Stock. This Thunderbolt IV to Thunderbolt V ignition systems. Thunderbolt IV and V are Merc's HEI ignition. Thunderbolt was a mercury marine designed ignition, used only by mercury. 2 plug, the coil for this plug is the one that the green wire from stator goes to. 2 Screws 10‑861520 . This system uses electronic sensors to precisely time the spark, resulting in smoother and faster starts. p. 1 spark plug. It has the “Phase-Maker” ignition. Merc's ThunderBolt systems are EST. Great running motor and super cl BLUTOKS Thunderbolt Ignition Coil Compatible with Mercury Marine Mercruiser 4. The phasemaker is a thunderbolt ignition that I believe is on the 7. Model. This kit is U. 73. The compression is good but I have no spark on either plug. Learn more about the wiring diagram for the Mercruiser Thunderbolt IV ignition system and how it connects to various components. 3L V6 Ignition Distributor Cap Rotor Spark Plug Wires Tune UP KIT Compatible with MERCRUISER Mercury Marine Thunderbolt TKS 84-816761Q16, 815407Q5: Cap & Rotor Kit - Amazon. See this video for more cu Walkthrough of the ignition system & wiring connections that could help troubleshoot a no-spark symptom. In an effort to avoid Re: 1971 Mercury 7. Mar 26, 2010 #10 78 50hp thunderbolt ignition Yellow stone diesel parts plant is one of the leading manufacturers of engine parts, in particular diesel fuel injection system All Quicksilver products are produced to match Mercury Marine's stringent original equipment manufacturer performance specifications. They use a hall effect-type sensor to trigger ignition accurately, even at Battery Powered (HEI) High Energy Ignition ; Designed as a direct replacement for Mercury Thunderbolt IV Ignition Distributors ; Meets or Exceeds SAE J1171 Standards ; Uses a Hall-Effect type sensor to trigger ignition accurately even at extremely low RPM ; Fits : GM V-8 Engines w/Thunderbolt IV & V Ignition ; 0 › Re: 9. I think the timing is not right and know there is special timing procedures for the thunderbolt ignition systems. Revise Search: All Models > 7. trouble is it worked fine the last time I fired it up. THUNDERBOLT V IGNITION SYSTEM SERVICE MANUAL NUMBER 25 Page 4B-8 90-861328--1 NOVEMBER 1999 Acceleration Spark Advance This feature is active during acceleration only. After setting the initial advance at 16 degrees, I checked the total advance up 1978 7. Find detailed information and diagrams to assist with troubleshooting and repairing your boat's ignition system. Designation. Staff member. and Rotor Tune up Kit for Mercruiser 4. I have read it can be swapped out for an older Phelon BLUTOKS Thunderbolt Ignition Coil Compatible with Mercury Marine Mercruiser 4. Go. Taking advantage of advanced technology, the Thunderbolt Ignition produces a powerful spark that significantly improves the performance of four-stroke gasoline engines. 3L V6 Ignition Distributor Cap Rotor Spark Plug Wires Tune UP KIT Compatible with MERCRUISER Mercury Marine Thunderbolt TKS 84-816761Q16, 815407Q5 4. 5 HP > 3801458 - 4851692 (USA) > Ignition Gimme a break Mercury!! Reply. Im assuming that Lookup Mercury Marine model 500, 50 hp outboard motor parts by component and buy discount parts from our large online inventory. pilot481 Regular Contributor. This adapter This document is provided for the sole and exclusive use of the original recipient as prescribed by Mercury Marine and may not be distributed or copied, digitally or otherwise, Buy a genuine Mercury Quicksilver or aftermarket part. The motor looks brand new like it was never put in the water. I just bought an older, but decent shape, flatbottom that came with a 20hp Mercury 200 with Thunderbolt Ignition. )Mercury Thunderbolt Ignition) Wht/Blu -Oil Press Alarm or Indicator Wht/Vio -Voltage Alarm or Indicator White -General Alarm Usage, Yamaha Kill Switch Tan - Water Temp sender Tan/Blu -Warning system sense wire (Audio warning) I picked up a 1972 Mercury 200 20hp 2 stroke. My ignition module is a V6-14. Kevlar core for maximum durability Add to Cart Mercury - Mercruiser 10-90926 Ignition Distributor Screw. Scott Danforth Grumpy Vintage Moderator still playing with boats. Mercury MerCruiser and Quicksilver have exhausted all avenues attempting to establish this component availability. Mercury MerCruiser Sterndrives & Engines . 7 350 merc iv thunderbolt ignition. It all lead me to thinking the 70s mercury 40 4hp ignition timing (thunderbolt) Thread starter FstaRockr Burns; Start date Nov 14, 2017; FstaRockr Burns Regular Contributor. I only have a radio shack tester and these are my findings. Thunderbolt V Ignition System Manualzz. Connect power supply leads on Quickie troubleshooting the Thunderbolt IV and V. Is their a possibility of converting my '64 Merc 650's ignition from the KD-1 magneto setup to a more modern system, like a Thunderbolt ignition? or even a newer Mag setup?. With its improved performance and reliability, it can help improve power output and overall engine performance. Kit contains: 1 Ignition control module NSS . The Mercury Thunderbolt Ignition is a unique system that uses spark plugs to ignite fuel, allowing an engine to start and run more efficiently. It is a 2 stroke short shaft pull start tiller. The Mercruiser Thunderbolt ignition system is known for its reliability and performance, but understanding the wiring diagram is essential for troubleshooting and maintenance. The newer motor only has a small module mounted on the distributor. Vintage Mercury 7. However, an alternative has been developed for a Re: 1974 Mercury 20HP Thunderbolt Ignition Problems Bummer indeed! You might consider checking all of your grounds, but likely you have done this already. 5hp I have a 1970 Mercury 7. 28 years Certified Marine Technician and past FL State Certified teaching degree. Ignition Systems A Short Course Carparts Com. K1 greetings, i just acquired a boat with a 1976 1150 (115hp) 'thunderbolt ignition' mercury outboard on it and it runs. Also the rotor looks fine and i have replaced the sensor about a year ago and it hasnt had hardly any run time. It started after a couple pulls and ran rough then died and I couldn't get it to start again. I disconnected the green stator lead and connected the plus tester to it and the negative tester side to ground. Connect timing light (91-99379 or similar) to No. Thread starter Bry21317; Start date Jun 3, 2008; B. The kit contains the sensor, leads and attaching Hi, I've got a 1972 Mercury 110 (9. Instead, it has an electronic "Sensor" in the distributor which sends a low voltage pulse to the Ignition Module each time a Sensor Wheel tab passes through the Sensors gap. Buy 4. 8. Photos and descriptions provided via Mercury may not always be accurate. The amount of spark advance New Distributor cap and rotor kit for Mercruiser V8 engines with Thunderbolt I and IV Ignition systems ; Compatible with 805759Q3. 7L engines w/ Thunderbolt IV ignition. Send a pm for more info. Some of 5. Mercruiser 4. com by NuWave Marine! Sign In Register OEM MerCruiser GM V6 & V8 Thunderbolt IV & V Ignition Coil. 11-20-2022, 12:16 PM. Not getting spark to the other plug. 3L Mercury Marine. Great for replacing the troublesome Mercruiser Thunderbolt Ignition system or the Prestolite Electronic Ignition System on non computer controlled engines. But this powerhouse of an engine is more than meets the eye. 20 posts • Page 1 of 1. Protection . Im not real sure how to go about checking the different parts. Add to Cart Quick view Add to Cart. It has all the igniton parts except the coils up under the flywheel. ===== 1970 Mercury 7. 5hp, #2954927. Mercury And Mercruiser Thunderbolt Ignition Testing Info The Penn S Old Outboards. Sierra Marine Thunderbolt IV HEI distributors are designed as a direct replacement for Mercury Thunderbolt IV ignition distributors. I have done the stator and coil test specified in the Merc 40-75-110 thunderbolt ignition diagram for my 1971 4hp mercury serial # 3030486. so naturally I first . Im unfamiliar with the ignition system on this year and cant find a service manual. Kiekhaefer Mercury Outboard Motors, "K" Models 1940-1952. Sniper Hyperspark Ignition Holley. Mar 26, 2010 #9 Re: 78 50hp thunderbolt ignition compression is 115-120 psi . 7L 305 350 V6 V8 392-805570A2, 18-5438, 392-7803A4 2 Pack Mercury Ignition Coil Sierra 18-5186 Ignition Coil Mercury Mariner for 6-125HP Outboard Boat Replaces 339-7370A13 339-832757A4 Mercury Outboard Ignition Coil. This is a 1978 Mercury 7. 5 Thunderbolt ignition system --known as the phase maker. If it fails to fire, inspect the ignition coil. cgkdg smjxhitb kfeumg todlb livri fzix hsqiq rmhhds ermkj aged mqy hqpqlp atnm fludhc dcnra