372Took it hard

[lwhaples]

Took this saw in for a little labor. Crank bearing is smoked.

 

[Jughead]

Geez thats crusty

 

[Danders]

Geez thats crusty

+1.

Bottom end looks pretty dry.

 

[KenJax Tree]

Sooo your 372 took it dry in the bottom end?

 

[lwhaples]

Yep,It sure did.

 

[TJ the Chainsaw Mechanic]

Sheesh!

 

[David Young]

piston smoked on the FW side?

 

[lwhaples]

Piston and chamber aren't bad looking. Connecting rod bearing and case bearing.Not so good. Saw was locked up,so I thought it was seized in the jug.

 

[idiotwithasaw]

Ouch

 

[cgraham1]

So you need a crank? Definitely not good. That's why I run my saws on 32:1...

 

[RIDE-RED 350r]

Jeez, an XT too.... Saw can't be that old being an XT can it?? That thing IS mighty crusty!

 

[lwhaples]

Crank ,bearings and the normal tune up parts might make it a runner. Have someone interested in it.

So you need a crank? Definitely not good. That's why I run my saws on 32:1...

 

[XP_Slinger]

That saw looks like it's 30 years old! A rough 30 years I might add. Too bad it's toast.

 

[idiotwithasaw]

Good opportunity to build it as an oe. Find you an original 50mm top end and swap it all out.

Sent from my HTC One using Tapatalk

 

[redtractor]

Alright, someone learn me good on how the bottom is dry enough to do that kind of damage but the p&c survive.

 

[5000+]

Piston and cylinder can do fine on 50:1;or even less oil, not the lower end, especially on a hi out put strato.

 

[redtractor]

But the strato only puts straight air into the transfers. The crankcase still gets a full dose of mix. What am I missing.

 

[cgraham1]

But the strato only puts straight air into the transfers. The crankcase still gets a full dose of mix. What am I missing.

A strato saw uses less fuel, therefore it also uses less oil, because the oil is mixed in the fuel... Less oil means less lubrication and more heat.

 

[P.M.P.]

A strato saw uses less fuel, therefore it also uses less oil, because the oil is mixed in the fuel... Less oil means less lubrication and more heat.

And thats why I don't want a strato.It's not a matter of if but a matter of when.

 

[RIDE-RED 350r]

From what I understand about strato's intended design, I don't believe they increase fuel economy by overall just plain less fuel. An engine of "X" bore by "Y" stroke operating at "Z" RPM is still going to need roughly the same amount if fuel actually present in the combustion chamber to run properly and without burning down... Aside from some obvious exceptions (relatively minor) when throwing different/modified port layout into the mix..They send less wasted unburned fuel out the exhaust than a conventional design. So given that, the only influence for better or for worse on the amount of lubrication your bottom end gets is the fuel/oil ratio you choose to run.

In other words, the savings isn't from skimping on the fuel being actually used and therefore the bottom end getting less lubrication, it is due to losing less fuel out of the exhaust that is an inherent function of a non-strato (conventional) port design.

Be happy with your stratos fellas, sooner or later regulations will be so stringent that the only design that will be in compliance will be 4-stroke. The day is coming.