Need help guys

[Webevan]

Looks like i got screwed big time from the guy who sold Me this dolmar 5105.

After texting the guy about it for a few weeks he held it for me snd i drove 5 plus hours all together to pick it up.


I shoulda made him take a bunch more pics and maybe a video of it running but he seemed very trustworthy so i just went to pick it up. On initial inspection it was not pretty but at least the sparkplug wiring wasnt burnt out, it ran and looked decent.


Well i could tell by the sound something the carb was dirty or it needed a tune up, so i decided i would take it apart and get her all fixed up.


I was told it had been completely gone through, he said his buddy the dolmar dealer said it was perfect. well it had never been cleaned, broken carb mount, chain catch broken off, someone beat the **** out of this thing.

I spent around 10 hours stripping it down and cleaning everything. Took carburetor off and cleaned everything out and reassembled.

Waited till this morning to fire it up. Well of course it wouldnt start. Adjusted idler screw, it turned over and was way to high chain running and all. Adjusted it but couldnt get it to slow down.

Well im starting and adjusting and in between i notice a small anount of smoke coming from around base of piston/ muffler area. Well it wouldnt start again after that. I checked chaintension and it was tight so I loosened it. I thought it was snug but turns out the guy gave me a chain that was too big for the bar!

Fml. Well after all that im stuck on what to next, prolly change spark plug but im not happy

 

[pioneerguy600]

I moved this over from Chainsaw Stickies to the Chainsaw forum. The OP has had a bit of a difficult time getting his thread started in the right place, I hope this does not turn into a buyers remorse thread so lets just help him with his real saw problem and not jump on him for buying a saw he should of known better about.

 

[cuinrearview]

These are great saws when right. Start by removing the muffler and posting a pic of the piston through the exhaust port.

What all did you take apart? How many turns out are the carb mixture screws currently?

 

[Totembear]

Sounds like you might have an airleak. If your chain wont slow down when adjusting idle screw or L screw, somethings wrong. Disassemble intake and reassemble. Start from where Dolmar tells you the screws out to be set at initially. If you dont have a pressure and vac tester, spray some starting fluid around the areas that are known to leak if it runs. If the engine dies or changes tune you've got a leak. If it ran when you picked it up, you have done something to it to not make it run.

 

[Sam R]

Agree on the above, excessive run out at "idle" speeds generally point to an air leak. I'm not familiar with Dolmar saws but on any other saw I've worked on there's usually some kind of rubber boot that mates the intake on the piston to the carburetor & something for impulse. There's also the seals & whether that's a clamshell or not, the crankcase.
Pics necessary to help, though. Let's see the piston through the muffler port at the least.

 

[cuinrearview]

I think a lot more info is needed here before anything is assumed. Ten hours of disassembly and cleaning could screw up a lot of ****...

 

[a. palmer jr.]

I'm not particularly crazy about the way Dolmar puts their intake boot on the cylinder with that puny spring instead of a clamp. You might check that...

 

[jltrent]

If it took you ten hours to work on, did you get everything back right. THat much time working on and it could be considered molested with.

 

[cuinrearview]

I'm not particularly crazy about the way Dolmar puts their intake boot on the cylinder with that puny spring instead of a clamp. You might check that...

Honestly out of all of them I've done only one of them leaked at the intake boot, and that was only because someone had previously been into it and had gooped some sort of sealant in there. Try un-screwing the spring and clipping a couple winds off of the end. Then screw it back together. It tightens it up nicely.

 

[a. palmer jr.]

Honestly out of all of them I've done only one of them leaked at the intake boot, and that was only because someone had previously been into it and had gooped some sort of sealant in there. Try un-screwing the spring and clipping a couple winds off of the end. Then screw it back together. It tightens it up nicely.

I haven't had any trouble with them either, but if I had the symptoms the op had I would look at the intake as a possible leak.