OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Chainsaws and Concrete Cutters Petrol Chainsaws and Concrete Cutters Ross chainsaw NO GO

Stored over summer but I did not drain fuel tank so I think problem is clogged carby. Good spark, fresh fuel, clean air filter. Is carby cleaning manageable by handyman?

The carburetor cleaning should done in an ultrasonic cleaner to get the deep hidden clogs. It is too delicate for using a dip cleaner or pressurized cleaners.

But before doing invasive work check to is if the engine will hit on introduced fuel mix. If it hits then it likely carb problems; if not then it is cylinder problems ie lack compression due to struck ring or cylinder damage. Most 2C I work on here needs at least 100 psi compression to start.

Hi it for senior,

As what AVB advised is to test for compression first. Good compression is around 90 - 110psi with average compression of 100psi. When stored over the year with fuel inside will likely to harden the metering and fuel diaphragm and cause some residue deposit on the low (iddle) venturi tiny holes next to the main jet. To properly fix the carby is to rebuild it and replace the gaskets and diaphragms. Quick and dirty fix is to remove both low and high tuning screws and inject with carby cleaner to unblock the nozzles while looking through the venturi and observing the fluid coming out of the main jet when injecting on the high (H) and also coming out to the tiny holes when injecting on the low (L) hole. To reset the screws, set to 1 1/2 turns CCW from full. Second dirty fix is to apply 30psi of pressure on the carburetor fuel intake to unblock the sticky needle. Third is to blow compressed air through the venturi and observe fuel mist coming out provided there still some fuel reserve on the metering otherwise feed the intake with fuel. Warning! I won't take any responsibility on my comments if you work need open flame or smoking.

Cheers,
TheCarbyMaster

OK guys, it has taken a while but I have discovered the fuel line is shot. A mixed blessing---it could well be the cause of my problem but replacing it looks a bit daunting. It is 1/8" bore so I cannot use my new fuel filter with a 3/16" nipple. Any further comments?

OK, things do move slowly here. Had to go to UK eBay to get correct size fuel hose. Fitted that but now have fuel leak when filling, guess the tank grommet was disturbed. It is sitting firmly as far as I can see. Any advice please? Will people see this new post?

You can get a small flat blade screwdriver and lift the edge of the grommet up and squish a bit of silicone under the edge, not the perfect fix but will get you past this problem for a while, at least till you see if you can get it running

Thanks Norm. This saw is fighting to the end to avoid going back to work. Following a tip on a forum I had a look at the muffler....totally blocked by wasp nest!!! Clened it out and saw is now a GOER!