Pioneer 620 - Won't rev up clean to full throttle

[pioneerguy600]

Loctite 620 would seal the metal to metal outer ring of an oil seal to the seal bore, with the engine under vac the green will be drawn in to any gaps.

 

[cdahl383]

I was going to say that little leak was not causing a problem. I would also have put some sealant around the leak and applied vacuum to pull it into the crack and let it cure. Hopefully, no leaks now. Too bad you don't have another Tilly HL to try.

Well it’s got a new seal now. I’ll check it tomorrow and see if it has any leaks.

So that leak wouldn’t cause a problem then? I figured since I found it I might as well fix it.

What’s your take on what the issue is? Carb related still?

I might try popping the Welch plugs off to see if there’s any crud in there.

What about that felt filter in the sediment bowl? Maybe I could remove that just to see if that’s restricting fuel flow?

It really does sound like it’s starving for fuel though. If it had an air leak wouldn’t it just run like that forever? It dies out like it ran out of fuel.

 

[cdahl383]

Loctite 620 would seal the metal to metal outer ring of an oil seal to the seal bore, with the engine under vac the green will be drawn in to any gaps.

I’ll keep that in mind for the future.

 

[pioneerguy600]

Well it’s got a new seal now. I’ll check it tomorrow and see if it has any leaks.

So that leak wouldn’t cause a problem then? I figured since I found it I might as well fix it.

What’s your take on what the issue is? Carb related still?

I might try popping the Welch plugs off to see if there’s any crud in there.

What about that felt filter in the sediment bowl? Maybe I could remove that just to see if that’s restricting fuel flow?

It really does sound like it’s starving for fuel though. If it had an air leak wouldn’t it just run like that forever? It dies out like it ran out of fuel.

Is the felt filter in the sediment bowl a new one or older used possibly hardened or partially blocked?. We replaced them every time we removed the glass for cleaning, about once a month back when those saws were our main tools in the woods. I think they came in a bag of 25 from our local dealer.

 

[cdahl383]

Is the felt filter in the sediment bowl a new one or older used possibly hardened or partially blocked?. We replaced them every time we removed the glass for cleaning, about once a month back when those saws were our main tools in the woods. I think they came in a bag of 25 from our local dealer.

It’s the old one that came with the saw. I soaked it in chem dip but maybe it’s just too far gone? I couldn’t find any online at the time so I just left it.

I could remove it temporarily just to see if it makes any difference. I’ve got a new filter in the tank so that should stop most of the crud from getting through.

 

[buzz sawyer]

It’s the old one that came with the saw. I soaked it in chem dip but maybe it’s just too far gone? I couldn’t find any online at the time so I just left it.

I could remove it temporarily just to see if it makes any difference. I’ve got a new filter in the tank so that should stop most of the crud from getting through.

Sounds like a problem I had on my boat. It idled fine and was ok at low speed but any high and it starved. Fuel filter in the carb was clogged - happened very suddenly. By all means, get that felt out and try it.

 

[Old2stroke]

I noticed in the video, when you loosened the fuel cap to see if that was causing fuel starvation, you tightened in right back up. You might want to try that again with leaving the cap loose for a few minutes. it takes a little while for the carb to recover the fuel volume under the diaphragm after it's been seriously depleted.

 

[cdahl383]

I noticed in the video, when you loosened the fuel cap to see if that was causing fuel starvation, you tightened in right back up. You might want to try that again with leaving the cap loose for a few minutes. it takes a little while for the carb to recover the fuel volume under the diaphragm after it's been seriously depleted.

Ok I’ll keep that in mind. Not sure if I’ll get to mess with it today, maybe tomorrow.