OVERHEAT> Runs Rough> HELP

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vonway

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Now a new problem..after getting the boat out of the water to check the drive for water in lube... and changing fluid today, i just launched the boat and ran out to the end of the canal, and noticed the temp. up to 220 and turned right around and went back to my slip. Just then it started running rough and ready to stall. Made it back and temp was gone back down to 180.. but still running really rough..let it sit for a bit and tried again, starts up fine... just runs like ***.. what now? did the seaweed at the launch ramp have something to do with this problem??? i am so mad that i cant even get to run the boat today >> HELP PLEASE (checked fuel filter for water), none-- emptied into jar and re-installed.
 
V

vonway

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Re: OVERHEAT> Runs Rough> HELP

1988 OMC Gm V8 Fourwinns... I>O
 
V

vonway

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Re: OVERHEAT> Runs Rough> HELP

thanks , ill do tommarrow... hope comp is ok?????
 
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vonway

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Re: OVERHEAT> Runs Rough> HELP

could the overheating have caused the plugs to foul out??? or could the clogged inlet (water pump or impellor cause the eng to run so rough??
 
Don S

Don S

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Re: OVERHEAT> Runs Rough> HELP

You have this same question tacked on to 2 other threads and have started 2 of your own. <br />Quit yelling help and spreading this thing over so many posts that people can't keep up with it.<br />Did you even open the engine cover and look at the engine after the problem started?
 
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vonway

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Re: OVERHEAT> Runs Rough> HELP

yes Don, i did look at the engine.. looks the same as it did before, nothing different, when it was happening , the miss and overheat , i had my wife hold the Engine cover open -- all i noticed was some blow by from the valve cover breather that attaches to the flame arrestor. smoked a little in this area... (oil blow by i suppose you would call it????
 
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vonway

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Re: OVERHEAT> Runs Rough> HELP

sorry about the repeated posts... just trying to get some responses... THank you all>
 
V

vonway

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Re: OVERHEAT> Runs Rough> HELP

THink it could be exhaust blockage (seaweed) causing the rough engine 000
 
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vonway

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Re: OVERHEAT> Runs Rough> HELP

hey don.. i checked the plugs today, and were black ( like they fouled out ) replaced them and still the engine wont start. sounds like it wanted to , just not gettting the fuel it needs or something.. fuel is getting in carb ! any ideas
 
L

lowshovel1

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Re: OVERHEAT> Runs Rough> HELP

have you done a compression and leakdown test yet,? your going to need the results of these tests.overheating your engine may or may not have blown a head or a head gasket.its a logical place to start----thats why Don S sugested it.let us know what ya come up with.
 
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vonway

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Re: OVERHEAT> Runs Rough> HELP

well , since it wouldnt start, i checked for spark , and found NONE.. so i replaced points and condensor. Bam , fired right up and ran great.... watched temp and no overheat, so i assume my pump or impellor is ok?? thanks for the input,,,, please respond
 
RandyJ

RandyJ

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Re: OVERHEAT> Runs Rough> HELP

WOW...wish I were soooooooooo lucky to get a fix that cheap and easy.
 
M

marunr

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Re: OVERHEAT> Runs Rough> HELP

Originally posted by yknots:<br /> watched temp and no overheat, so i assume my pump or impellor is ok??
Click to expand...
Were you on the muffs or on the water. If you were on the muffs the hose pressure will bypass the impellar, so you can't assume this. If on the water idling, ok.
 
V

vonway

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Re: OVERHEAT> Runs Rough> HELP

on the water , ideling Ok... 1500rmp ok,,,, seems to be fine, but should i worry??? thanks
 
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vonway

Petty Officer 2nd Class
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Re: OVERHEAT> Runs Rough> HELP

should this v8 Gm OMC be at 185* idleing temp>??<br />Thats where its always been , maybe guage not correct
 
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