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Troubleshooting Help - Running Rough

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » Troubleshooting Help - Running Rough « Previous Next »

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Ben Lasher
New member
Username: benlasher

Post Number: 2
Registered: 09-2013
Posted on Saturday, October 12, 2013 - 05:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a Gray 175 V8 (V8CH-175) that has been running great all summer. This week, it became a little hard to start and runs rough at idle RPM's with some stalling, and it is putting out something through the exhaust that is floating on top of the water. It doesn't look or smell like gas, I'm thinking oil.

It runs fine at higher RPMs.

Any thoughts?
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Ben Lasher
New member
Username: benlasher

Post Number: 3
Registered: 09-2013
Posted on Sunday, October 13, 2013 - 01:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Looks like a carb problem. After shutting the engine off, fuel is still pouring into the carb/engine. I assume I have a stuck float, but a few gentle raps on the side of the carb has ot freed it up.

Assuming the material coming out my exhaust and floating on the water is unspent fuel.

Also assuming that it runs fine at higher RPMs because it can burn off the extra fuel, whereas at idle speeds, it is flooding itself.
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kim hartshorn
Member
Username: kimhartshorn

Post Number: 18
Registered: 08-2010
Posted on Sunday, October 13, 2013 - 07:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

have you checked the timing recently...maybe the points? could just need a tune-up

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