Fruecrue 660 build thread

[Gentleman]

View attachment 75762 View attachment 75763
Marks on piston and band have sharp edges and corners. They also happen to be directly in line with the swell in cylinder wall and damaged ring.

Sending you another cylinder it today.

 

[Fruecrue]

Sending you another cylinder it today.

That's great. Thanks Bruce.

 

[wcorey]

One of my cross cylinders had some little balls of plating stuck to the squish band. Since it's shipped with the piston in the bore there were a bunch of tiny dents in the piston crown that sort of resemble detonation craters.

 

[stihl_head1982]

Good eye.

 

[MustangMike]

the far right o ring im not quite sure right now

I thought the far right O ring is to seal the oil pump to the case.

I got several duplicate rubber, and a few I'm not sure of yet.

 

[huskihl]

I thought the far right O ring is to seal the oil pump to the case.

I got several duplicate rubber, and a few I'm not sure of yet.

Oil pump to case seal is 3 to the left of that o ring. It's round, but has a square profile

 

[MustangMike]

Then what is the little O ring for???

 

[dall]

Spare parts

 

[Termitebuffet]

Then what is the little O ring for???

Her pleasure ? [emoji13]

 

[MustangMike]

Oil pump to case seal is 3 to the left of that o ring. It's round, but has a square profile

That one does work much better, but they gave me two??? An extra?

 

[Fruecrue]

Got my new cross jug. Thanks again Bruce!
Back in the game.
Timed very similar to the first jug.
Squish .016" sans the gasket.
Ring gap stays uniform throughout the cylinder.
Going to tone down the port width on this one........for now.

 

[Deets066]

That one does work much better, but they gave me two??? An extra?

Yes there are extra parts

 

[MustangMike]

Yea, I got about 10 extra parts. Most I know are duplicates, a few I'm not really sure.

 

[Fruecrue]

Yea, I got about 10 extra parts. Most I know are duplicates, a few I'm not really sure.

Pic?

 

[MustangMike]

Sure. I believe everything on the right is a duplicate. The upper left, I think I know where it goes. Lower left, not really sure.

 

[Fruecrue]

Sure. I believe everything on the right is a duplicate. The upper left, I think I know where it goes. Lower left, not really sure.

@dall

 

[Fruecrue]

Upper left is a tank buffer, attaches right to the case with a small screw

 

[Fruecrue]

Lower left i believe is a wiring bushing for ignition, kill switch wiring.
Hard to tell from end view.

 

[Fruecrue]

Timed the farmertec cylinder & piston as I think comparison to others is interesting.

Ex- 96
Trans- 126
In- 84
Squish- (no gasket) .015"

 

[MustangMike]

Cutting the base & band would help the Ex & In, but play havoc with the transfer. Maybe a finger port???