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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
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
June 25, 2015 My 1985 140 Mercruiser stopped running on two random times when underway
June 25, 2015 My 1985 140 Mercruiser stopped running on two random times when underway after-operating fine at 15 knots. Both times, engine will then turn over but no firing. Your kind thoughts are re… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,534 satisfied customers
i have a 1985 mercruiser 140.would not start this season.I
i have a 1985 mercruiser 140.would not start this season.I found a defective fuel pump.Replaced it still no luck.My next step found that It had no spark.I replaced condenser,rotor,cap and plugs.It wou… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
i have a 1985 sea ray with a 140 mercruiser. it was rebuilt
i have a 1985 sea ray with a 140 mercruiser. it was rebuilt last summer. it will start on about the third try and i have to put it in neutral and rev it up a little bit. then it has to warm up for a w… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a 1985 Mercruiser 170. Engine was running fine. Took
I have a 1985 Mercruiser 170. Engine was running fine. Took to marina to have some work done (replace the exhaust manifold becuase it was cracked). Engine will not start now. Marina replaced the coil,… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I am working on a 1987 Four Winns 160 Freedom with a 140 hp
I am working on a 1987 Four Winns 160 Freedom with a 140 hp 3.0. I have just replaced the camshaft and timing gears. the boat has not ran in two years. The trouble is it will not start. I am not getti… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 95 MerCruiser 5.7, Thunderbolt IV, Serial #OF367661,
I have a '95 MerCruiser 5.7, Thunderbolt IV, Serial #OF367661, and Weber carb. This motor has a serious issue. It will start and run fine for a little while, then start missing out bad. It usually sta… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a 1985 Fourwinns with a Merc 140 in it. its been sittiing
I have a 1985 Fourwinns with a Merc 140 in it. its been sittiing for a long time. i have replaced the coil, plugs, cap, rotor, points, condenser. still no spark at plugs. has weak spark at points. eng… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a mercrusier 140 i/o will crank but wont start not
I have a mercrusier 140 i/o will crank but won't start not getting any spark from coil to distributor already replaced coil… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1985 3.7 mercruiser 190 hp 4 cyk. engine. We are
I have a 1985 3.7 mercruiser 190 hp 4 cyk. engine. We are having trouble with it not starting or running erratically. The resistant wire runs from the electric choke to the coil. It is heating up and … read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
Why does my 1985 four winns with a 140mr die when I shift it
Why does my 1985 four winns with a 140mr die when I shift it into gear ? I ran ok for about an hour . Doe my boat have two plug holes?… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
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
gearheadII
Bachelor's Degree
138 satisfied customers
I have a 1985 Mercruiser 170. It has no spark. I have replaced
I have a 1985 Mercruiser 170. It has no spark. I have replaced the coil and condensor, set the point gap and replaced the plugs and wires. When I turn the key on, I measure 12 volts at the positive ig… read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
I have a Mercruiser 140 in a 85 Larson. Hasnt been ran since
I have a Mercruiser 140 in a 85' Larson. Hasn't been ran since May 08' in which it ran absolutely flawless. It has been garaged since and winterized. It is turning over fine but no fire. Not getting a… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I converted my 1985 MerCruiser 140 HP 4 cyl from points to
I converted my 1985 MerCruiser 140 HP 4 cyl from points to electronic ignition (Mallory). It runs great for 45 minutes and then quits. I let it set for 20 minutes and it starts right up and runs for a… read more
Greg Robinson
Greg Robinson
Senior service manager
Vocational, Technical or Trade Scho
199 satisfied customers
I have a 1985 Mercruiser 140. The throttle/gearshift is hard
I have a 1985 Mercruiser 140. The throttle/gearshift is hard to bring from forward to neutral, reverse to neutral, like a binding. With the engine off there is no problem moving the shifter from forwa… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
Good day everyone. Am having an engine kick my butt !!! OK,
Good day everyone. Am having an engine kick my butt !!! OK, here we go, 7.4 L mercruiser 1997, spark yes, fuel yes, did all mercruiser tests, even by passed boat's wiring harness and went straight to … read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
140 HP 181 cid 3 liter GM Mercruiser built 1985. Runs ...
140 HP 181 cid 3 liter GM Mercruiser built 1985. Runs great at all speeds for one hour then runs rough and stalls. Wait 20 minutes and runs like a charm again for another hour. Spark is good, accelera… read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
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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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