Engine trouble shooting

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4Wins

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Re: WOT Fluctuations

Re: WOT Fluctuations

Levinz11 said:
Could be a spun prop hub. From my reading when they go that's usually it but maybe yours is letting go...then catching again?? Mark the prop and the shaft with a sharpie. Make the situation you describe happen again. Then check to see if your marks are still aligned.
Click to expand...
Got it. Will check tomorrow thanks!
 
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Celtichawk

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Re: Engine trouble shooting

I know it's probably all you have for a hands on manual but the guys around here will tell you Factory best, seloc second best, and clymer your desperate.

Hope you figure it out.
 
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bonzoscott

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Re: Engine trouble shooting

4Wins said:
The throttle is one of the first things I will be looking at bonzoscott. I am very interested to see what the WOT plates are looking like.
Click to expand...
I am merely saying: Engine not running - push throttle (in neutral) to WOT, then look down the throat of carb and verify that the throttle plates are perfectly vertical. In other words, opening all the way. If they are not vertical, you may need cable adjustment. If that is the case, send me a PM.
 
airdvr1227

airdvr1227

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Re: Engine trouble shooting

Just watched your video and I don't think you are getting anywhere near WOT. I believe you have too much prop. Other thing to consider is the age of the boat. You stated you should be 'flying' with a 5.0L. Maybe a new one but possibly not this 19 year old carbed motor.
 
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SeaTea

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Re: WOT Fluctuations

Re: WOT Fluctuations

What is your WOT? Might you be hitting the RPM limiter? Is it carbed or injected?
 
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SeaTea

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Re: Engine trouble shooting

Just responded to your other thread, please ignore it. Make sure your timing is correct, both static and full advance. Any manual should give you those numbers. Dont go throwing parts at it untill you know the basics are sound, timing, compression, cables adjusted, clean flame arrestor, clean fuel filters, good spark plugs.
 
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4Wins

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Re: Engine trouble shooting

Went out today to change out my cap and wires because they are all gummed up. Did a one for one swap of the new wires onto the old cap and then a one for one swap with new wires and onto new cap. Something went wrong. Now the engine is not runningh good at all and barely starts.What do I do?
 
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4Wins

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Re: WOT Fluctuations

Re: WOT Fluctuations

Went out today to change out my cap and wires because they are all gummed up. Did a one for one swap of the new wires onto the old cap and then a one for one swap with new wires and onto new cap. Something went wrong. Now the engine is not runningh good at all and barely starts.What do I do?
 
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4Wins

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PLUG WIRES AFU Please help!

PLUG WIRES AFU Please help!

1995 OMC 5.0 502APHUE


Went out today to change out my cap and wires because they are all gummed up. Did a one for one swap of the new wires onto the old cap and then a one for one swap with new wires and onto new cap. Something went wrong. Now the engine is not running good at all and barely starts.What do I do?
 
Boomyal

Boomyal

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12,072
Re: PLUG WIRES AFU Please help!

Re: PLUG WIRES AFU Please help!

Wow 4Winns, way too many posts on the same subject. It's kind of like spamming. You could have stuck with a continuation of your original one. You'd get better results.

Maybe it is time to bite the bullet and consult a knowledgeable engine mechanic?
 
Bondo

Bondo

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Re: PLUG WIRES AFU Please help!

Re: PLUG WIRES AFU Please help!

Boomyal said:
Wow 4Winns, way too many posts on the same subject. It's kind of like spamming. You could have stuck with a continuation of your original one. You'd get better results.

Maybe it is time to bite the bullet and consult a knowledgeable engine mechanic?
Click to expand...

Ayuh,.... Now there's 1 big 1,....

4wins,... Cut it out,.... Stop postin' new threads,... It causes Confusion for Everybody,...
Please read Our postin' rules, 'n guidelines at the top of the main forum page, then abide by them,...
 
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4Wins

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Re: Engine trouble shooting

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.
 
Bondo

Bondo

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Re: Engine trouble shooting

4Wins said:
Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.
Click to expand...

Ayuh,.... Did ya notice it says to start A thread of yer own,..??

Not 4 or 5 or more,.....
 
Sparkinator

Sparkinator

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Aug 15, 2009
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Re: Engine trouble shooting

Celtichawk said:
Your gonna need to drill holes into your stringers below deck and check for dry wood shavings. Also drill holes into transom without going trough the fiber glass hull and again checking for dry shavings. Many others will chime in and provide the proper drill depth and specifics. Check around in the restorations threads its got some good reads.
Click to expand...

That 95 Sundowner has fiberglass stringers with a foam core. DON'T drill them. There isn't any wood in there.
 
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Celtichawk

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Messages
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Re: Engine trouble shooting

sparkinator said:
That 95 Sundowner has fiberglass stringers with a foam core. DON'T drill them. There isn't any wood in there.
Click to expand...

Ouch that would have been bad huh? Sorry for that info I provided before I knew the steuctural layout of that particular boat. Good thing you didn't listen and jump out there right away! :).
 
boaterinsd

boaterinsd

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Re: Engine trouble shooting

sparkinator said:
That 95 Sundowner has fiberglass stringers with a foam core. DON'T drill them. There isn't any wood in there.
Click to expand...

what other boat manufactures used this in there construction?
 
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4Wins

Seaman
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Re: Engine trouble shooting

If any of you are still interested in the ACTUAL trouble shooting going on here. Turns out there actually two firing orders for the engine model number for the 1995 Ford OMC 5.0 joint venture period. The tag on my engine wasn't the correct firing order. (Go figure) So because I was going off of that wrong tag (data plate) 4 out of 8 cylinders were not firing on schedule. I read the alternate firing order in another iboat thread. Now that I am firing on time I tuned the carb, verified my throttle plates, checked my compression and all were around 150psi. I am still having WOT throttle issues though. 3800 RPM AND 25 MPH. I'm gonna pull the boat back out. Power wash it. Change the prop and check fuel pressure. Thanks for all of your help. I appreciate the time you take to read this long and "confusing" thread. Lets keep it positive though.
 
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