SoCal Bill
New OPE Member
Hey guys, new member here rebuilding an 041 AV Farm Boss that's been around longer than I have. I have a few question and was hoping to get some experienced feedback.
For the first time I couldn't get the saw to fire, new plug, starting fluid, nothing. Compression seemed a little soft so I decided to pull it apart and see whats going on. I was given the saw by my grandfather, but I don't have any real history on prior maintenance. It always just worked and never needed much.
Odd things I noticed:
The carb insulator plate (plastic thing, #8 in the exploded diagram) is missing. (I assume the carb was rebuilt at some point and this was forgotten, discarded, etc). Is it a critical piece that I should seek out a replacement?
Piston only has a single ring. From the diagram manual I downloaded it shows single or dual ring pistons. Everything I have found for sale is dual ring, so I assume they interchange just fine?
Now that it's torn apart I obviously need a new cylinder. Cross performance seems to be the only aftermarket solution i've found. Anything else to look at? Seems I could swap a 48mm Super Cylinder on, but they are pretty hard to find?
My other plan was to change the small end rod bearing, crank seals and oiling system O-Rings, and fuel lines while i'm this far in it. Crank bearings seem good, no excessive play that i've noticed. Anything else I should dive into that I'm overlooking? Carb rebuild kit just because it's cheap?
Any cheap/easy mods to kick some more power out of it? Raise compression, etc? Is this an easy one to ditch the base gasket and seal it, or does it get finicky with the changed port timing? (I know a little about 2-smokers, but not much on the details of this particular saw).
As long as i've had it, the saw was run on Stihl 50:1 oil with 87 octane 76 fuel. Seems like it might want a bit more oil than that based on the piston/cylinder damage.
For the first time I couldn't get the saw to fire, new plug, starting fluid, nothing. Compression seemed a little soft so I decided to pull it apart and see whats going on. I was given the saw by my grandfather, but I don't have any real history on prior maintenance. It always just worked and never needed much.
Odd things I noticed:
The carb insulator plate (plastic thing, #8 in the exploded diagram) is missing. (I assume the carb was rebuilt at some point and this was forgotten, discarded, etc). Is it a critical piece that I should seek out a replacement?
Piston only has a single ring. From the diagram manual I downloaded it shows single or dual ring pistons. Everything I have found for sale is dual ring, so I assume they interchange just fine?
Now that it's torn apart I obviously need a new cylinder. Cross performance seems to be the only aftermarket solution i've found. Anything else to look at? Seems I could swap a 48mm Super Cylinder on, but they are pretty hard to find?
My other plan was to change the small end rod bearing, crank seals and oiling system O-Rings, and fuel lines while i'm this far in it. Crank bearings seem good, no excessive play that i've noticed. Anything else I should dive into that I'm overlooking? Carb rebuild kit just because it's cheap?
Any cheap/easy mods to kick some more power out of it? Raise compression, etc? Is this an easy one to ditch the base gasket and seal it, or does it get finicky with the changed port timing? (I know a little about 2-smokers, but not much on the details of this particular saw).
As long as i've had it, the saw was run on Stihl 50:1 oil with 87 octane 76 fuel. Seems like it might want a bit more oil than that based on the piston/cylinder damage.
