difficult outboard

[stwilliam54]

I have a 1969 Evinrude Triumph 55 hp on a 15ft Arrowglass trihull. Just bought it in August and can't get it to run right. I have no top end power. It will run smooth up to 3/4 throttle but after that it will cut out and lose power. Here is what I have done so far--<br />new tank (yes the valve is open)<br />new fuel lines<br />new fuel pump <br />new lines from pump to carbs.<br />rebuilt carbs<br />changed points<br />wire insulation was severely deteriorated so put on new wire harness.<br />put on new amplifier box.<br />Checked compression (125-135 lbs.)<br />After all this still has same symptoms. Does run better at low end but still cuts out and loses power after 3/4 throttle, but if I pull on the choke it will run just fine at almost WOT.<br />What am I missing. <br />Can anyone out there help? Thanks.

 

[AMFcrestliner]

Re: difficult outboard

Sounds lean to me...just my opinion

 

[stwilliam54]

Re: difficult outboard

How do I make it richer there are no high speed adjustments, only low speed adjustments and they make no difference

 

[AMFcrestliner]

Re: difficult outboard

I am an automotive mechanic, I can point into the direction but do not know how to tell you to get there...know what i mean

 

[Yepblaze]

Re: difficult outboard

Make sure the main jets are clean enough to see well through. It could have plugged exhaust ports.

 

[12Footer]

Re: difficult outboard

Yepblaze has the answer, I think. Since you can get it to run right when you give it choke, the jets and pickup tube are where I would go back, and re-do.<br />Also, check float level setting. The jet will look open sometimes, but will be restricted. Run a pipecleaner thru it,or if smaller diameter than a pipecleaner, a pin soaked in carb cleaner.