problem after one hour

richard1234

Cadet
Joined
Jul 24, 2010
Messages
6
I have an new problem.
The last weeks we used our boat almost everyday,
First 3 days 4 a 5 hours a day, at normal speed. (10 12 Mph)
No high speed or something

The last days we can cruise for one hour (sometimes more, sometimes les)
after an hour the engine gets starting shuffel, en running not on all the 8 cilinders anymore..

When i go idle, the engine stops running most times, or is ideling between 500 / 600 rpm.

The ingention is on time, all the 8 sparks are working.
Whe checked the ignition, no problems? 8 new sparkplugs (the where realy black an 3 won't work anymore)

A meganic checked, and my choke was hanging, so the fixed that problem en cheked the engine fule/air mix. So that should also me okay right now.

My motor is an OMC 5.7 (350? chevy)

I called the meganic, and he tought my coil is the problem. After an hour he delivers not enough power anymore, Mayby some cables to and after the coil?

Mayby someone can help my to tackel this problem?

Thanx
 

NYBo

Admiral
Joined
Oct 23, 2008
Messages
7,107
Re: problem after one hour

Did your mechanic replace the coil? If you are losing spark, a coil that has gotten heat-sensitive is a frequent cause.
 

richard1234

Cadet
Joined
Jul 24, 2010
Messages
6
Re: problem after one hour

No we don't changed the coil right now.
That would be our next action if you guys tink that could be the problem
 
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