Porting Farmertec 372xp BB

[ericm979]

What is the purpose of the step in the exhaust port? I've seen "anti reversion" steps in some four stroke exhaust ports but not two strokes.

 

[morbius18]

I would set the squish between .017"-.020".

Thanks, I only wish that I had a lathe. I was going to trash this cylinder, but wanted the practice. When I pull it off, I'll raise the transfers more.

 

[Gypo Logger]

Not trying to derail this thread, but does anyone know off hand what the DL count is for a 30" Stihl mount GB professional pro top 3/8 with 8 tooth for a 660.
Thanks

 

[Gypo Logger]

No help when a brother woodtick asks a brain numbing question!
I have no other alternative but to pose my question on the "All Ausie Drible Tread."
Thanks for nothing and being dumber than a sack of hammers!

 

[Gypo Logger]

Working on a 385/390

 

[huskihl]

View attachment 688874 Working on a 385/390

Looks cozy.

 

[huskihl]

Not trying to derail this thread, but does anyone know off hand what the DL count is for a 30" Stihl mount GB professional pro top 3/8 with 8 tooth for a 660.
Thanks

The Googles say 98dl of 3/8 on a 30" Stihl bar. Couldn't find info on gb

 

[Gypo Logger]

Looks cozy.

Do you speak of the stove or the 385?
Very cozy, 30f outside, 80f inside.

 

[mdavlee]

Not trying to derail this thread, but does anyone know off hand what the DL count is for a 30" Stihl mount GB professional pro top 3/8 with 8 tooth for a 660.
Thanks

Pretty sure 98 is correct. Glad to see you’re still kicking.

 

[huskihl]

View attachment 688876

Do you speak of the stove or the 385?
Very cozy, 30f outside, 80f inside.

Yes

 

[Gypo Logger]

Disregard the pretty lady above irrespective of her prettiness. She could chuck more wood than a woodchuck could chuck.
As an afterthought, there are girls out there who groove on saws and downing wood.

 

[pioneerguy600]

View attachment 688876

Do you speak of the stove or the 385?
Very cozy, 30f outside, 80f inside.

Only 30F outside, you are in a heatwave up there John!

 

[morbius18]

98 exhaust is fine. I shoot for 98-100.

I don't like that much blowdown on a 372. Take them up to 118-120.

I pulled the cylinder off, cleaned off the dirko.

Does this sound right?
1. Put cylinder on the piston without rings

2. dialed in the degree wheel

3. put the saw at BDC

4. removed cylinder

5. Put ring in the bore

6. Turn the flywheel to 118 degrees

7. Remove cylinder

8. pencil a line on the bottom of the ring

9. Raise transfer to this line

 

[morbius18]

 

[blsnelling]

That'll work.

 

[Gypo Logger]

Only 30F outside, you are in a heatwave up there John!

Plus 2c here now with 2mm of fresh snow.

 

[Gypo Logger]

Pretty sure 98 is correct. Glad to see you’re still kicking.

Thanks for chiming in, you saved me from counting two or three times.

 

[pioneerguy600]

View attachment 688977
Plus 2c here now with 2mm of fresh snow.

Ontario?

 

[Gypo Logger]

I pulled the cylinder off, cleaned off the dirko.

Does this sound right?
1. Put cylinder on the piston without rings

2. dialed in the degree wheel

3. put the saw at BDC

4. removed cylinder

5. Put ring in the bore

6. Turn the flywheel to 118 degrees

7. Remove cylinder

8. pencil a line on the bottom of the ring

9. Raise transfer to this line

Just as a general procedure, after warming up the saw, retorque head bolts and muffler.

 

[Gypo Logger]

Ontario?

Ya, Credit River Terra Cotta 2005