husky 353 intermittent fast idle

[agg221]

Bit of an update:

 

richened it up a bit to allow a bit of safety margin and have been keeping an ear on it. it seems as though it only ever does it when the tank is around half empty, and nearly always at the same fuel level, and the revs it sits at are just the same as you get just before you run out of fuel (can you see where I'm heading) - haven't had a look yet but, would a pinhole in the fuel line give a similar effect if it was sucking air in above th efuel level?

 

I don't know this saw, but is the tank of a shape such that you can run it down to the level where it starts, then turn the saw on its side and cover the pipe again? If so, then if turning the saw so the pipe is covered causes it to go away, there's your answer.

 

Alec

[Chris Sheppard]

I don't know this saw, but is the tank of a shape such that you can run it down to the level where it starts, then turn the saw on its side and cover the pipe again? If so, then if turning the saw so the pipe is covered causes it to go away, there's your answer.

 

Alec

 

Haven't really investigated that side of it yet - it was an idea I'd had since last using it and wasn't sure if I was off on a tangent or if it could have been a possibility - will have a dig about later this week.

[spudulike]

It really could be a number of things - typical problems are crank seals, leaking decomp valve, leaking impulse line, leaking carb boot (a real bugbear on these 3 series Huskys) or could be a leaking welch plug or the carb needing a clean, as well as the fuel line, filter.

 

Whatever it is, make sure that top end fubbs and doesn't scream otherwise there is a risk of it seizing.

 

If you run out of talent then send it over - I don't tend to break the bank!