Steve NW WI
Unwanted Riff Raff.
Went to fire up the old 271 today, make sure it's ready for an appearance at the GTG next weekend. Anyway, the beast wouldn't start, so tonight I dragged it into the basement. Found it to have good spark, was getting gas, compression seems ok for as old as it is. (I will be picking up a gauge tomorrow, along with a set of ball allens for home, they're all I use at work, but for some reason the straights have always been good enough at home.)
Anyway, I got to tearing stuff apart (just gotta be done, don't it...). Tons of scraping gunk (as you'll see in the pics), and added a little air compressor to my shopping list. Something small and cute that can hide under the bench in my unfinished basement-any suggestions?
Keep in mind that I'm about 20 years removed from the last time I tore into a 2-stroke here, and memory ain't perfect, so terminology here may be a little rough. When I got the recoil off, I noticed one of the flywheel weights (centrifugal advance?) was stuck open. I decided that wasn't a good thing, and after playing a bit, found that the clip holding it on would bind in one spot and hold it open. One little tweak and that's fixed, but would it have caused hard/non starting?
Next item up for bids was pulling the muffler (see what you guys have done to me
). Broke the spotweld nuts that hold the exhaust deflector to the muffler, but can cure that monday at work, or sooner with the wire feed if I get itchy.
Here come the obligatory pics...scoring on the back wall of the cylinder looks ugly in the pic, but nothing I could feel with a pick. Mostly everything looks shiny and real good for the hours this old saw has on it. Also - I thought most small motors this size got by with a single ring?
Of course the muffler itself fell under my scrutiny. Looking in from the port side, into an internal baffle with 13 holes about 5/16" diameter - works out to .935 sq in of holes vs the port size of .720 sq in - should be ok there, even accounting for the directional changes this is forcing.
Just a big can looked at from the outlet side:
Here is the backup in the system. The deflector measures out to a meager .225 sq in opening not deducting for the dent in it.- COMPLETELY UNACCEPTABLE!
My plan here is to snip along the edges, and bend it out to about a .650 open height, which should give an outlet area of .605 sq in, about 84% of port size, and weld some filler into the gaps. This oughta help a lot, and not even be noticable once the heat shield goes back on over the whole shebang.
Well, back to the dungeon for some more cleaning! Dishwasher might get a workout tonight too - heck only a single guy is tearing saws apart on Friday night! Only problem is I'd have to unload the dishes that are in there...
Questions? Comments? Tips? I'll be checking back in later.
Thanks,
Steve
Anyway, I got to tearing stuff apart (just gotta be done, don't it...). Tons of scraping gunk (as you'll see in the pics), and added a little air compressor to my shopping list. Something small and cute that can hide under the bench in my unfinished basement-any suggestions?
Keep in mind that I'm about 20 years removed from the last time I tore into a 2-stroke here, and memory ain't perfect, so terminology here may be a little rough. When I got the recoil off, I noticed one of the flywheel weights (centrifugal advance?) was stuck open. I decided that wasn't a good thing, and after playing a bit, found that the clip holding it on would bind in one spot and hold it open. One little tweak and that's fixed, but would it have caused hard/non starting?
Next item up for bids was pulling the muffler (see what you guys have done to me
). Broke the spotweld nuts that hold the exhaust deflector to the muffler, but can cure that monday at work, or sooner with the wire feed if I get itchy.Here come the obligatory pics...scoring on the back wall of the cylinder looks ugly in the pic, but nothing I could feel with a pick. Mostly everything looks shiny and real good for the hours this old saw has on it. Also - I thought most small motors this size got by with a single ring?
Of course the muffler itself fell under my scrutiny. Looking in from the port side, into an internal baffle with 13 holes about 5/16" diameter - works out to .935 sq in of holes vs the port size of .720 sq in - should be ok there, even accounting for the directional changes this is forcing.
Just a big can looked at from the outlet side:
Here is the backup in the system. The deflector measures out to a meager .225 sq in opening not deducting for the dent in it.- COMPLETELY UNACCEPTABLE!
My plan here is to snip along the edges, and bend it out to about a .650 open height, which should give an outlet area of .605 sq in, about 84% of port size, and weld some filler into the gaps. This oughta help a lot, and not even be noticable once the heat shield goes back on over the whole shebang.
Well, back to the dungeon for some more cleaning! Dishwasher might get a workout tonight too - heck only a single guy is tearing saws apart on Friday night! Only problem is I'd have to unload the dishes that are in there...
Questions? Comments? Tips? I'll be checking back in later.
Thanks,
Steve
