346xp starting problems

[Crispin]

Cutting wood yesterday all going well, then suddenly becomes difficult to start, when it does run fast for about 5 seconds then dies. Now unable to get it to run, occasional short start as above then stops. What would be the likely cause...carburettor. Did check the mesh thing on the exhaust and that was fine. Pointers most welcome! Thanks Chris

[spudulike]

Either measure the compression or pop the exhaust off and take a look at the piston through the exhaust port. It is possible it has had a seize and is now lacking compression hence the failure to start.

 

You will need to remove the bar and chain to get the muffler off as the support bracket slides in behind the felling dog and is held in place with two bolts as well as the main two that go in to the cylinder.

 

Let us know how you get on!

[Crispin]

Thanks Spud Had a quick look, has a hex/allen type screw, usual allen keys may not be up to the job, may need to get some T-handled or power ones! Is this the sort of thing you would be interested in, possibly combined with a porting job?

[spudulike]

Thanks Spud Had a quick look, has a hex/allen type screw, usual allen keys may not be up to the job, may need to get some T-handled or power ones! Is this the sort of thing you would be interested in, possibly combined with a porting job?

 

It is the backbone of the sort of work I usually end up with. Saws others have written off that I bring back to life....bit like Lazurus:thumbup:

 

Normal allen keys may shift it, the two long bolts tend to get pretty locked up, stick some WD40 on the heads overnight and see if it loosens them up, a tap from a hammer may help also!

[Crispin]

Thanks Lazarus...will try that, strange because it was working beautifully up to that point. Please feel free to pm me costs to repair/port if you wish, in case resurrection is needed.