1982 J60elcnm dies when running full throt

[TiminIN]

J60elcnm runs fine in moderate speed but when I put it in full throttle 10 seconds later it hesitates and if I don't back it down it dies.

 

[ezeke]

Re: 1982 J60elcnm dies when running full throt

Could be running out of fuel or could be overheating. What else is happening that did not happen before this problem.

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

It was running fine until I changed the spark plugs. They didn't have champion at the time so I bought NGK, would that make a difference. When it happened for the first time on Friday I just thought it was low on gas so I put some in (about 2 gal) and then it still did it. I rebuilt carbs last season. I did have a similar problem before, but I increased idle and it seemed to solve the problem. I have worked on this engine quite a bit over the past 4 years and changing a blown head gasket was one project, I hope it isn't over heating again.

 

[kenmyfam]

Re: 1982 J60elcnm dies when running full throt

Personally I would change back to the champions, however I don't believe that is the cause of your current issues. Will it run "all day" at 2/3 throttle ???

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

Yes, it will run all day at 2/3 throttle.

 

[kenmyfam]

Re: 1982 J60elcnm dies when running full throt

Have you checked fuel delivery from pump to carb's ???

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

Just check fuel delivery from pump to carbs, it all looks good, I put new hoses on last year when I rebuilt carbs and they look fine. I ran the engine and didn't see any leaks. I also put on a new pump last year. It's been a few years since I changed the big canister fuel filter, what happens when they need changed?

 

[ezeke]

Re: 1982 J60elcnm dies when running full throt

Once they become dirty, fuel won't flow through them. After a point, they cannot hold any more water so it gets to the engine. Best plan is to dump the filter periodically, and replace it once a year.

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

I cleaned the filter out. I'll try it now.

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

Still does it. I'll replace the canister on the fuel filter and I guess I need to rebuild the carbs again.

 

[TiminIN]

Re: 1982 J60elcnm dies when running full throt

Solved my problem...got rid of my old metal gas tank and hooked up plastic one...problem solved.
Thanks for all your input.