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I was told this might be the place to ask, jackofall i hear you're the echo man.

I've been working on my uncle's 702vl and have it running but it won't stay running for more than a couple minutes.

It sat for years. Im not familiar with this era saw at all but went through and cleaned it up.

Piston looks great from exhaust side, I replaced fuel line, rebuilt carb and adjusted high and low per the manual. Running it on 40-1 Lucas mix. It fires right up and runs like a scalded dog for 2 maybe 3 minutes then dies. No amount of pulling on it will even get it to hit. Wait about 15 minutes and itll do it all over again.

Thoughts?
 
Tank vent
I was told this might be the place to ask, jackofall i hear you're the echo man.

I've been working on my uncle's 702vl and have it running but it won't stay running for more than a couple minutes.

It sat for years. Im not familiar with this era saw at all but went through and cleaned it up.

Piston looks great from exhaust side, I replaced fuel line, rebuilt carb and adjusted high and low per the manual. Running it on 40-1 Lucas mix. It fires right up and runs like a scalded dog for 2 maybe 3 minutes then dies. No amount of pulling on it will even get it to hit. Wait about 15 minutes and itll do it all over again.

Thoughts?
Sounds like a faulty tank vent.
 
What was the matter with it??
The rubber tip had come out of the needle seat and the origional brass washer was still in the Saw, I put the new needle seat over the top of it lol
I was told this might be the place to ask, jackofall i hear you're the echo man.

I've been working on my uncle's 702vl and have it running but it won't stay running for more than a couple minutes.

It sat for years. Im not familiar with this era saw at all but went through and cleaned it up.

Piston looks great from exhaust side, I replaced fuel line, rebuilt carb and adjusted high and low per the manual. Running it on 40-1 Lucas mix. It fires right up and runs like a scalded dog for 2 maybe 3 minutes then dies. No amount of pulling on it will even get it to hit. Wait about 15 minutes and itll do it all over again.

Thoughts?

Cool was my first thought, I I really like how someone told you my thread would be the place to ask, makes me all warm and fuzzy inside lol
 
Yikes, I feel left out, the only stuff I run is 50:1, but then again it's ethanol free (now) and using good stihl oil. Dad was saying about how way back in the early 2000's he had talked to a Homelite guy in the cities about the 350 not running great, and even he said to run good oil at 50:1. I have had no problems, even with the older saws, and even think that the 50:1 is sorta on the high oil for the trimmer and blowers. Tend to get some carbon buildup even though they are tuned pretty good.
 
Yikes, I feel left out, the only stuff I run is 50:1, but then again it's ethanol free (now) and using good stihl oil. Dad was saying about how way back in the early 2000's he had talked to a Homelite guy in the cities about the 350 not running great, and even he said to run good oil at 50:1. I have had no problems, even with the older saws, and even think that the 50:1 is sorta on the high oil for the trimmer and blowers. Tend to get some carbon buildup even though they are tuned pretty good.

I run the 32:1 for my ported saw and tuned other saws around that mixture.
 

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