Stihl 018

[spike47]

Hi there

 

I have a Old Stihl Chainsaw , I can not get it to start , good spark , but everytime I try to start it the plug gets wet , that is with and without using the choke , it seems to have good compression , but if I pull it over slowly , I can here hissing coming out of the carb inlet , is there some sort of reed valve for these 2 stroke engines ! .

 

cheer

 

spike

[monkeymoreton]

Id take the exhaust off to make sure theres no scoring

 

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[spike47]

Hi

 

I had taken the muffler off to see if there was any blockage , it seemed ok , it was all hollow so I don't know where they could of been any blockage , what do you mean scoring ! .

 

cheers

 

spike

[Ray1]

Scoring, Vertical lines on the piston. The piston should look smooth with no ridges or grooves.

[peatff]

Many pictures of scored pistons through the exhaust port showing you what to look for.

[spike47]

Scoring, Vertical lines on the piston. The piston should look smooth with no ridges or grooves.

 

Hi

 

Thanks for your reply , sorry I did not know what you meant , the piston looks ok both sides from muffler side and from carb side .everything seems to be ok , spark seems to be ok , there is fuel getting there , I can not really understand why it will not start .

 

Maybe I am not pulling it hard enough , it did fire up for a second or so when I first tried it a couple of days back , I tried to restart it but no luck , so removed the plug and it was dry so I thought it was a fuel problem , I then removed the carb and give it a clean out and check the Diaphragms , now it is getting fuel and there is a spark , not 100% sure how you tell whether it is a good spark ! .

 

cheers

 

spike

[peatff]

Put a spot of neat fuel down the plug hole, heat the plug with a blowlamp or gas ring and put it back in quickly then try starting it on fast idle setting. It usually helps to give the motor a little kick up the backside.

[spike47]

Put a spot of neat fuel down the plug hole, heat the plug with a blowlamp or gas ring and put it back in quickly then try starting it on fast idle setting. It usually helps to give the motor a little kick up the backside.

 

Hi there

 

OK got it started , I put a little oil in cylinder and it started up straight away , so I think it will need a set of rings at least , will strip it down and see what condition everything is , thanks for your help .

 

cheers

 

spike