Post by blythkd on Dec 2, 2020 20:15:41 GMT -5
I just encountered somewhat of a head-scratcher yesterday so thought I would share.
I was tuning a 360 for my son and it kept dying. We knew the fuel line and filter were ok and the carb was clean and in good shape. I normally turn in the LO screw until the engine starts to stumble a bit then back it out about a 1/4 turn. That's usually pretty close to where it needs to be. Every time I turned in the LO screw yesterday, at the point where it should normally start to stumble, it would just die before I could turn the screw back out. So I backed it out a lot and restarted the saw. After a few seconds it would still just die all at once. It would start right back up and run fine with some throttle or wide open, but let it idle and a few seconds later it would die.
I told my son it acted like the carb was losing prime. I noticed the fuel inlet nipple on the carb looked a bit wet. It was the plastic fitting like the later saws have. I wiped off the fuel then watched it closely and noticed it turning wet again. So I got down close to it and wiped it off again and watched fuel leak out of a crack in the side of the plastic inlet nipple. My son pulled the carb, removed the plastic nipple and pressed a new metal fitting in place. After it was back together, I started it up and everything adjusted fine and the saw idled and throttled properly.
Seems like I recall Leon mentioned finding a cracked plastic nipple on a 360 oiler some time back, maybe in a video? We found an oiler that wouldn't draw a while back and the plastic fitting was the culprit. I've seen a lot of 360's and this is the first one I recall with a cracked plastic inlet nipple on the carb. If the oiler nipple and the carb nipple aren't the same fitting, they're very close.
I keep living and learning.
I was tuning a 360 for my son and it kept dying. We knew the fuel line and filter were ok and the carb was clean and in good shape. I normally turn in the LO screw until the engine starts to stumble a bit then back it out about a 1/4 turn. That's usually pretty close to where it needs to be. Every time I turned in the LO screw yesterday, at the point where it should normally start to stumble, it would just die before I could turn the screw back out. So I backed it out a lot and restarted the saw. After a few seconds it would still just die all at once. It would start right back up and run fine with some throttle or wide open, but let it idle and a few seconds later it would die.
I told my son it acted like the carb was losing prime. I noticed the fuel inlet nipple on the carb looked a bit wet. It was the plastic fitting like the later saws have. I wiped off the fuel then watched it closely and noticed it turning wet again. So I got down close to it and wiped it off again and watched fuel leak out of a crack in the side of the plastic inlet nipple. My son pulled the carb, removed the plastic nipple and pressed a new metal fitting in place. After it was back together, I started it up and everything adjusted fine and the saw idled and throttled properly.
Seems like I recall Leon mentioned finding a cracked plastic nipple on a 360 oiler some time back, maybe in a video? We found an oiler that wouldn't draw a while back and the plastic fitting was the culprit. I've seen a lot of 360's and this is the first one I recall with a cracked plastic inlet nipple on the carb. If the oiler nipple and the carb nipple aren't the same fitting, they're very close.
I keep living and learning.
