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I have a 1984 mariner 150 hp, at first I had no spark on any
Hi I have a 1984 mariner 150 hp, at first I had no spark on any cylinders. Took it to the shop the replaced stator,trigger,plugs. I took to boat out for a run and it work well for awhile then lost pow… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a Mariner 25 hp xd only one coil fires. switch coils
I have a Mariner 25 hp xd only one coil fires. switch coils and the no fire condition goes to the other coil. I bought a switch box and just tried it , problem persists. Any suggestions?… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a 1991 Mercury 175 hp that has low power. What compression
I have a 1991 Mercury 175 hp that has low power. What compression reading should I get. Buddy says over 100psi. I have 100psi on one and 97psi on one and all others are 95 psi… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
Mercury mariner 2007 9.9 spark plug aren't firing. unpluged
mercury mariner 2007 9.9 spark plug aren't firing. unpluged the black wire with the yellow strip and still would not start. what else could be the coil?… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,889 satisfied customers
i have a 35 hp mercury that has no spark to either plug it
i have a 35 hp mercury that has no spark to either plug it had a used stator trigger and switch box put in it we then put a different set of coils onit still no spark we disconnected the wire harness … read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
I have a 100 hp Mercury outboard motor that will only fire
I have a 100 hp Mercury outboard motor that will only fire on three cylinders. The points and condensers have been changed and new coil wires added, but still only fires on three. What am I missing?… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have 1984 75 HP mercury would start in cold start. Goes dead
I have 1984 75 HP mercury would start in cold start. Goes dead when put in gear. Was not firing on 1 an 2 cylinders. Replaced switch box .now is not firing on #1. Replaced coil no help. I need help… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
80 elpto 1987? snB179981 has a test button in wiring diagram. What
80 elpto 1987? snB179981 has a test button in wiring diagram. What is purpose of test button and could it be why I get no spark to any cylinder when coils are fine etc.… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 2008 Mercury Big Foot 50 HP Outboard. Cylinder 3
I have a 2008 Mercury Big Foot 50 HP Outboard. Cylinder 3 is not firing. I can tell because while the engine is in neutral running at 1200 RPM, the engine rpms drop when you unplug the electric line j… read more
Noel Schembri
Noel Schembri
Marine mechanic
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1996 Yamaha 150 hp outboard does not fire on starboard side.
1996 Yamaha 150 hp outboard does not fire on starboard side. Ihave twins, so I swap out numerous electronic parts and nothing seems to work. Any suggestions?… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
i have a mercury 200 hp, i have changed the stator and trigger
i have a mercury 200 hp, i have changed the stator and trigger recently, cleaned the carburators. it started right away, no problem. when i put in the water, i was getting about 3.5- 4 thousand rpms o… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a mercury 150 2 stroke outboard which was running just
I have a mercury 150 2 stroke outboard which was running just fine and while running stopped and when I restarted the engine it began making this loud knocking sound I shut down the engine. The engine… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,889 satisfied customers
I have a 82 mercury 80 hp 4 cyl that does not fire on cylinders
I have a 82 mercury 80 hp 4 cyl that does not fire on cylinders 3 & 4. I have replaced the trigger assembly, the stator, and the rectifier. still no spark at plugs. Is myu next step to replace the swi… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
looking from the rear of my boat on the right side only the
looking from the rear of my boat on the right side only the top and bottom 2 plugs are firing nothing on center and none on the left side are firing what could b causing this… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
HI I have a 60 hp mercury red band outboard 1989 model with
HI I have a 60 hp mercury red band outboard 1989 model with the bottum sparkplug not firing I have replaced the stator ,installed 3 new coils 3 new spark plugs plugs and replaced the leads cleaned all… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
hi got a 50 hp mercury 4 stroke about 10 yrs old runs but has
hi got a 50 hp mercury 4 stroke about 10 yrs old runs but has fault keeps running on 2 cylinders when it should run on 4 any suggestions where to start to solve this cheers richard… read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
I have a 2004 25 hp mercury. The engine sank in salt water.
I have a 2004 25 hp mercury. The engine sank in salt water. Everything was flushed out with fresh water, carbs cleaned, etc.. Now... when starting the engine and in neutral it sounds like its getting … read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
I have a 1978 Mercury 90hp 2 stroke engine. A short ...
I have a 1978 Mercury 90hp 2 stroke engine. A short somewhere in the wire harness caused the battery to melt along with some internal components. I put on a new harness, the engine is cranking but wil… read more
Pappy's Sales and Service
Pappy's Sales and Service
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Jeff G.

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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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