Trusting the Sniff Test...

[Mat H.]

I made the mistake of trusting my nose to determine if I had the can of mix gas... Turns out, my nose was wrong... It's been an adventure finding parts. I had to carefully remove the gasket between the intake manifold and the head to reuse it. I also used some RTV (high temp, gas resistant) to back it up. Other than that, it's slowly coming back together.
Parts damaged: piston and cylinder wall.
Parts replaced: Used head from Heidi4217 on EBay, New piston from Lil Red Barn (llrbn) on EBay, New head base gasket from Timberline Sales on EBay, Used air filter from Bryanplust on EBay


Anyone know what's up with Chainsawr.com? Bought from them a few years ago when my flywheel fan disintegrated. Haven't heard boo from them this go-around.

 

[HarleyT]

Doesn't look like damage from straight gas,
to me......

 

[SuperDuty04]

That sucks! I’ve read a lot of posts like these. I don’t understand why people don’t have one very clearly identifiable can that they only use for mixed gas that way they always know. I bet you do, now!

Good luck on the rebuild, hopefully it all goes well. I’d do a base gasket delete while you’re already in there.

 

[s sidewall]

Never knew you could tell a difference between mixed and not mixed by smelling it. I know my gas is clear with a slight yellow tint til I add oil, then it goes dark blue.

Steve Sidwell

 

[HarleyT]

Never knew you could tell a difference between mixed and not mixed by smelling it. I know my gas is clear with a slight yellow tint til I add oil, then it goes dark blue.

Steve Sidwell

It works for clean underwear!!

 

[Mat H.]

Doesn't look like damage from straight gas,
to me......

The only thing mixed in the gas I used to kill Mr. Red was Sta-bil. The damage is from the piston ring folding over due to the excessive heat and no lubrication...

 

[buzz sawyer]

Never saw a piston ring fold over like that. The rest of the piston doesn't look that bad. Was the saw ported in the past?

 

[Mat H.]

That sucks! I’ve read a lot of posts like these. I don’t understand why people don’t have one very clearly identifiable can that they only use for mixed gas that way they always know. I bet you do, now!

Good luck on the rebuild, hopefully it all goes well. I’d do a base gasket delete while you’re already in there.

Too late on the base gasket delete... But, I guess it would take much at this point to do it. What do you recommend in its place?

And, yes... I have a can CLEARLY marked as mix now! lol!

 

[Mat H.]

Never saw a piston ring fold over like that. The rest of the piston doesn't look that bad. Was the saw ported in the past?

It seems like when I screw something up, I need to take it to the next level! lol
I do not know if the saw was ported or not.

 

[HarleyT]

Doesn't look like damage from straight gas,
or overheating.

 

[HarleyT]

Hmmmm.

 

[HarleyT]

Where is the rest of the ring?

 

[buzz sawyer]

How long did it run before the damage occurred? I would have expected to see a lot more piston damage. I see the damage to the cylinder port - that is the intake port, right? Looks like something was sucked into the intake.

 

[Mat H.]

Intake side. It is possible that it is a combination of the wrong gas and foreign objects. But I do know, for sure, that it was unmixed gas.

 

[gary courtney]

i take a q-tip and dip it in blue dye and that will die 20 gallons a dark blue

 

[SuperDuty04]

Too late on the base gasket delete... But, I guess it would take much at this point to do it. What do you recommend in its place?

And, yes... I have a can CLEARLY marked as mix now! lol!

Motoseal is what I was advised here to use and is what I bought to put my 365 back together. I found it at advanced auto parts

 

[HarleyT]

http://www.madsens1.com/saw_piston_fail.htm

 

[s sidewall]

Don't look like from gas, definitely looks like something got sucked in or a bearing roller.

Steve Sidwell

 

[s sidewall]

Is the ring locator pins still intacked?

Steve Sidwell

 

[Mat H.]

Pretty sure the pins are still in place. I'll have a second look when Ibget home from work.

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