Squish is still .052 with no gasket, now what?

[watsonr]

Been working on a saw and finally got it back together. Measured the squish and it's .052 without the base gasket. OEM cylinder and piston and compression is at 135. Not where i want it, so now what do I do?

Sand down the case? Try another piston?

Thanks,

 

[mdavlee]

What saw is this on Randy? You might need to have the base machined a little to tighten that up.

 

[watsonr]

An 064. Its a runner, just not a high compression runner. Wonder if I switch to another jug and slug that will change? ScooterBum was trading me an 066 p&c I have for the 064 p&c he has. Waiting for it to arrive, but scavenged what I had around here to try. Wished I had a way to do that here.

 

[little possum]

:agree2:

Fresh rings?

 

[Scooterbum]

An 064. Its a runner, just not a high compression runner. Wonder if I switch to another jug and slug that will change? ScooterBum was trading me an 066 p&c I have for the 064 p&c he has. Waiting for it to arrive, but scavenged what I had around here to try. Wished I had a way to do that here.

Sorry about this,
Send me your address again. I cleaned out my PM box to good the last time.P&C are here on my desk.

 

[rymancm]

Machine the cylinder base.

 

[Scooterbum]

I'd check all your crank and rod bearings real close for up and down play first.

 

[watsonr]

After I put it back together if does have a bearing that is questionable. I'm going to rip it apart and do the bearings.

Fresh rings

 

[barneyrb]

Did you check the compression height? The 046 and 064 piston will interchange with the difference being compression height (pin to top of piston). Sounds like you have a 046 slug.

 

[pioneerguy600]

That sounds excessive for any 064-066`s I have worked on, most of them would have the piston hit the squish band without an OEM gasket in them.

 

[jockeydeuce]

No idea if it's related to your problem or not, but I had a similar experience awhile back with an incorrectly machined Episan brand piston in an 064 I was building......They had taken the correct piston blank and machined the deck height to 046 specs.

Here's the thread from when I was having the same issue.

http://www.arboristsite.com/chainsaw/165599.htm

 

[watsonr]

OK, Then does anybody know the correct pin to deck height and I'll take a measurement?

 

[barneyrb]

OK, Then does anybody know the correct pin to deck height and I'll take a measurement?

22.5mm vs 23mm per the Meteor web site

STIHL Chainsaw Mod. 046 2 Strokes 1833 bore 52 compression height 22.5 Pin 39.5 12 X 33 X 8

STIHL Chainsaw Mod. 064 2 Strokes 1832 bore 52 compression height 23 Pin 43 12 X 33 X 8

 

[motoman.5150]

my 066 mag had no base gasket and run about 180 with baileys bb kit, only saw i have came across that wouldnt work without a gasket was an 028 woodboss, i run all mine that i have worked on without a gasket

 

[Arrowhead]

subscribing

 

[watsonr]

Sorry about this

Don't be, not a big deal. Like you, I just need to fiddle with stuff and that's what I was doing here and ended up getting edjumacated on 460/064 pistons!

 

[Scooterbum]

Boxed up and on it's way. You should have it by Saturday.

 

[watsonr]

Boxed up and on it's way. You should have it by Saturday.

Thanks!