perry_merc
Member
Hello, I am new to the forum.
I have a 1986 Mercury 50hp outboard motor (ser# 08a996688) and am experiencing an odd problem.
Motor ran great last season and now will not run when trimmed down. Great blue spark on all cylinders when tilted in full up position. But, engine dies and fire is gone on all four cylinders and spark plugs.
Engine dies at approximately have the way down when trimming.
I have checked kill switch, fuel flow is great, brand new spark plugs, stator, trigger, fuel lines, carburetors have been cleaned, new floats and needles. Spark plug wires have great spark and continuity when in up position. Coil spark shocked the tar out of me twice by accident. Silenoid fires well.
As far as I can tell the switchbox is good. But, I am not absolutely sure. Installed a brand new one 5 years ago.
I have attempted to troubleshoot using a lot of expert suggestions here on this forum. But, not an expert with ohms testing and do not have a DVA adapter.
I completed the following to the best of my ability: trigger test, stator test, removed the black/yellow tracer kill wire at the switch box.
I have looked tirelessly to determine if any wires are grounding out or moving when tilting down to no avail.
I am posting here out of frustration and exhaustion. Ready to get my boat out on the water but, cannot head down the lake with the engine tilted up all the time. hahahahaha.
Engine runs well, accelerates and seems fine when tilted up. Starts on first crank and keeps running at idle, no problem.
Any help or suggestions are greatly appreciated.
Thanks, perry_merc
I have a 1986 Mercury 50hp outboard motor (ser# 08a996688) and am experiencing an odd problem.
Motor ran great last season and now will not run when trimmed down. Great blue spark on all cylinders when tilted in full up position. But, engine dies and fire is gone on all four cylinders and spark plugs.
Engine dies at approximately have the way down when trimming.
I have checked kill switch, fuel flow is great, brand new spark plugs, stator, trigger, fuel lines, carburetors have been cleaned, new floats and needles. Spark plug wires have great spark and continuity when in up position. Coil spark shocked the tar out of me twice by accident. Silenoid fires well.
As far as I can tell the switchbox is good. But, I am not absolutely sure. Installed a brand new one 5 years ago.
I have attempted to troubleshoot using a lot of expert suggestions here on this forum. But, not an expert with ohms testing and do not have a DVA adapter.
I completed the following to the best of my ability: trigger test, stator test, removed the black/yellow tracer kill wire at the switch box.
I have looked tirelessly to determine if any wires are grounding out or moving when tilting down to no avail.
I am posting here out of frustration and exhaustion. Ready to get my boat out on the water but, cannot head down the lake with the engine tilted up all the time. hahahahaha.
Engine runs well, accelerates and seems fine when tilted up. Starts on first crank and keeps running at idle, no problem.
Any help or suggestions are greatly appreciated.
Thanks, perry_merc
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