Jimmy in NC
Pinnacle OPE Member
- Local time
- 12:27 PM
- User ID
- 57
- Joined
- Dec 23, 2015
- Messages
- 1,994
- Reaction score
- 8,010
- Location
- North Carolina
So I've had a box of 026 kicking around and I'm tired of kicking project boxes around. I decided to put it together and play with the ports a bit just to see what I can do. I've done more stock rebuilds than I care to remember and it's time to see if I can handle a twirly bit too...
So I built it with as much Asian flavor as I could .. well because it's a budget build for me. Saw went together well and cranked with no fuss. It's wearing a Farmer Tec 44.7 jug and piston with no base gasket. Squish is at 0.026-0.027". Carb has been both an AM carb from Dave and a rebuilt WT-194 carb. Saw cranks cold and warm, idles all day. Comes off idle like other 026's I've had (stock saws)... not my ported 346.. but not a stock 088 either.
The problem is I cannot get it to go over 13,000 rpm.. I did see 13,200 once.
The jug I cleaned up the casting flash, modded the muffler (mild), and barely widened the exhaust. None of the ports were changed other than some beveling. Same Farmer Tec shape and size.
I shaved 0.012" off the key to advance the timing.
Saw is blowing 190 psi according to my Echo gauge.
My question is this: Can the jug timing be off so bad that it will not go over 13,000?
I plan on trying to run it with the air filter removed this afternoon to see if that makes a difference. I do not think the shutter is being sucked closed, but I want to remove that as a possibility. Next step is to pull the timing advance out of it. I doubt it's over advanced as it cranks well and idles well but I can remove it to eliminate a possibility.
The only other thing I know of to do is clean up the OEM jug and buy a 44mm piston for it.
Any of you experienced porters have any ideas or thoughts? I think that if it was lean for fuel it would go to the moon. I can add fuel and take fuel away and it simply will not go over 13k. I can only come up with the thought that it just cannot move enough through efficiently to turn any higher.
So I built it with as much Asian flavor as I could .. well because it's a budget build for me. Saw went together well and cranked with no fuss. It's wearing a Farmer Tec 44.7 jug and piston with no base gasket. Squish is at 0.026-0.027". Carb has been both an AM carb from Dave and a rebuilt WT-194 carb. Saw cranks cold and warm, idles all day. Comes off idle like other 026's I've had (stock saws)... not my ported 346.. but not a stock 088 either.
The problem is I cannot get it to go over 13,000 rpm.. I did see 13,200 once.
The jug I cleaned up the casting flash, modded the muffler (mild), and barely widened the exhaust. None of the ports were changed other than some beveling. Same Farmer Tec shape and size.
I shaved 0.012" off the key to advance the timing.
Saw is blowing 190 psi according to my Echo gauge.
My question is this: Can the jug timing be off so bad that it will not go over 13,000?
I plan on trying to run it with the air filter removed this afternoon to see if that makes a difference. I do not think the shutter is being sucked closed, but I want to remove that as a possibility. Next step is to pull the timing advance out of it. I doubt it's over advanced as it cranks well and idles well but I can remove it to eliminate a possibility.
The only other thing I know of to do is clean up the OEM jug and buy a 44mm piston for it.
Any of you experienced porters have any ideas or thoughts? I think that if it was lean for fuel it would go to the moon. I can add fuel and take fuel away and it simply will not go over 13k. I can only come up with the thought that it just cannot move enough through efficiently to turn any higher.
And pics. And I’m a fan of Am parts, cos they are affordable
