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I have a 93 baja outlaw 454 330 hp with msd egnition. after
I have a 93 baja outlaw 454 330 hp with msd egnition. after running at 3500 to 4000 crusing I pull back to idel it breaks up and backfires.the coil gets so hot you canot handle it. the motor never ove… read more
Jason
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1988 mercruiser 302,v-8, 5.0. NO SPARK AT COIL. i have
1988 mercruiser 302,v-8, 5.0. NO SPARK AT COIL. i have already done these, replaced coil, ignition switch,ignition sensor, dist. cap and rotor. have tested MODULE and found 11.7 volts coming from red/… read more
Tan
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Certified Marine Technician
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2001 mercruiser no spark at coil Insalled new coil still no
2001 mercruiser no spark at coil Insalled new coil still no spark has power at red wire on plus side of coil and power at white wire on neg side of coil motor is 5.7 has new dist cap and rotor module … read more
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no spark even with hot wire to pos side of coil from batt.
no spark even with hot wire to pos side of coil from batt. 91 mercruiser 5.0 brand new coil.… read more
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I have a 1987 4.3 mercruiser ,thunderbolt 4 ignition ,2 barrel
I have a 1987 4.3 mercruiser ,thunderbolt 4 ignition ,2 barrel carb, it runs good for about 45 minutes than goes dead , no spark . let it cool down overnight and it runs good for 45 min. I put a new s… read more
Tan
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I have 4 cylander mercruiser wth very low voltage spark. This
I have 4 cylander mercruiser wth very low voltage spark. This all started when I tried to put in a Mallory Electronic conversion kit. My engine is the GM model 120/140, from 1984. Is there something t… read more
Whitecap36
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I have a 1996 Bayliner with Mercruiser Alfa-One 3.0 litre/LX
I have a 1996 Bayliner with Mercruiser Alfa-One 3.0 litre/LX with digital electronic ignition Engine Serial # XXXXX Mod. MCM 3.0 181 cid Afer a 30 min. run the coil brakes down and gets hot and starts… read more
Capt.Cory
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I have a Mercruiser 185HP 3.8L, when engine is cold it starts
I have a Mercruiser 185HP 3.8L, when engine is cold it starts and runs perfectly. Run it for 30 - 40 minutes and when you shut it off it won't start again. Eventually you keep turning it over and over… read more
Master Tech
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I have a no spark from the coil situation on a 1990 5.7L
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Tan
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I have a Mercruiser 350 Mag MPI with 325 hrs. Bravo 1. I lost
I have a Mercruiser 350 Mag MPI with 325 hrs. Bravo 1. I lost spark last weekend.(Thunderbolt V) (I have 12 volts at the coil. I can't get the coil to fire by grounding the lead from the distributor. … read more
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I have a 1984 Mercruiser engine with points. I replaced the
I have a 1984 Mercruiser engine with points. I replaced the points, all wires, and coil. I don't know how to wire up the coil. There is 4 wires. A purple ( constant ), red with yellow strip ( comes fr… read more
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Working on an old 1972 chevy 350 motor, put on a new 4 bar
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capt ron 1959
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I have a 1999 bayliner I/O 3.0 mercruiser in it, Im having
I have a 1999 bayliner I/O 3.0 mercruiser in it, I'm having some electrical problems, I troubleshoot it using my multimeter. Main problem is I have no spark to the spark plugs, I have new spark plugs … read more
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What should the distance be on the points for a Mercruiser
What should the distance be on the points for a Mercruiser 140? I changed the points, dist. cap, rotor and solenoid. Boat ran fine until I got down to about 1/8th of a tank of fuel then stalled. Added… read more
gearheadII
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I have a 1990 mercruiser 4.3 inboard. Im not getting spark
I have a 1990 mercruiser 4.3 inboard. I'm not getting spark to the engine. I changed the ignition sensor and the dist cap. I changed out the coil as well. I tested the red and white wire coming out of… read more
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mercruiser 454 mag. horizon gen VI spark from distributor
mercruiser 454 mag. horizon gen VI spark from distributor is low , engine will not start. I changed distributor module with no improvement in spark.… read more
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Hi, I have a 1981 formula 302, rebuilt motors with all the
Hi, I have a 1981 formula 302, rebuilt motors with all the internal goodies and etc. Stb motor started to die out, no spark, restarted right up after, revved up to 3000rpm then died out again, rebuilt… read more
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I have a 89 Mercruiser, w/454 engine.(Scarab boat) The boat
I have a 89 Mercruiser, w/454 engine.(Scarab boat) The boat will not start. I have power to the postive side of the coil, but no fire to the plugs. How do I diagnos the ingnition?… read more
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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