I had a similar problem. It turned out that the vacuum line that ran from the carb to the engine crankcase had rotted off. The line ran the fuel pump in the carb from the changing pressure in the crankcase as the piston moved.
Getting Worse... #$%^&
- Thread starter Dale
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Treenabe, I think that is called the Impulse line, and I understand it's not uncommon for them to go bad. I replaced one on my 028.
Actually, the carb. cleaned up fairly nice. I'll get er going. I didn't have a nice blowup pic of the carb. before, but I have one now. Actually Walbro.com seems to have diagrams of most of their carbs on their website.
Hey, this is kinda changing the topic, but Sunday I lost a "'Star" type screw that holds one side of the muffler on, so I took the muffler off completely to check the exhaust out. I have a fair amount of black what I would guess is oil burnoff built up on the muffler and exhaust port. I'm thinking this is normal, and just requires a frequent cleaning as routine maintenance. I took a peek at the piston while I was there, and it looks ok, but I was wondering......... is it routine maintenance to change the rings ? I know my buddy raced dirtbikes and would change rings every other race.
Oh and man is my muffler in bad shape. Smashed in the front. Can I still pick up a muffler for that 028 ? if so what would I expect to pay ?
Actually, the carb. cleaned up fairly nice. I'll get er going. I didn't have a nice blowup pic of the carb. before, but I have one now. Actually Walbro.com seems to have diagrams of most of their carbs on their website.
Hey, this is kinda changing the topic, but Sunday I lost a "'Star" type screw that holds one side of the muffler on, so I took the muffler off completely to check the exhaust out. I have a fair amount of black what I would guess is oil burnoff built up on the muffler and exhaust port. I'm thinking this is normal, and just requires a frequent cleaning as routine maintenance. I took a peek at the piston while I was there, and it looks ok, but I was wondering......... is it routine maintenance to change the rings ? I know my buddy raced dirtbikes and would change rings every other race.
Oh and man is my muffler in bad shape. Smashed in the front. Can I still pick up a muffler for that 028 ? if so what would I expect to pay ?
timberwolf
Addicted to ArboristSite
Rings may be a bit more than routiene, more of an as needed, if compression is good, just cleaning them and the groves up is fine (make sure they are not sticking), if there are lots of hours on it and compression is down rings might well be worth doing.
timberwolf
Addicted to ArboristSite
By sticking, I mean the ring can not move freely in the ring groove often due to carbon or a bit of smeared aluminum, and thus can not make a good seal with the cyl wall.
It can be done without special tools, but it is not an easy job if you have not worked on engines before, and there are things that can go wrong and wreck the saw.
It can be done without special tools, but it is not an easy job if you have not worked on engines before, and there are things that can go wrong and wreck the saw.
Enough said Timberwolf. But if I ever throw my hat into the engine ring, there can't be an easier engine to work on right ? One piston, one sleeve. I would definitely have a complete manual. Speaking of which, why can't they make a type of manual that you find for cars like a Chilton Manual that would cover an array of Stihl saws or other saws. That would be really nice to have.
