overheated 550xp

[dfh346xp]

scotchbrited the transfer out of this cylinder and added new meteor piston. Think it will run for long ? light duty firewood and 32/1 mix ?

( high res pics )

 

[spuldup]

Looks to be through the plating. If so, I would not use my time to put it back on, then do it again. Would be a new P&C the first time. But good luck if you choose to try it!

 

[dfh346xp]

Looks to be through the plating. If so, I would not use my time to put it back on, then do it again. Would be a new P&C the first time. But good luck if you choose to try it!

Best non oem replacement ? Or if someone has a serviceable oem used part I'm interested.

Ty

 

[spuldup]

Best Am replacement is usually considered to be Meteor piston and caber rings.

 

[holeycow]

The 550xp deserves to run like it was meant to...although a little more torque would be nice.

Get an oem top end. Probably with a thinner base gasket..

Oh, and that cylinder looks like toast. It'll run great! For a very short time.

 

[dfh346xp]

The 550xp deserves to run like it was meant to...although a little more torque would be nice.

Get an oem top end. Probably with a thinner base gasket..

Oh, and that cylinder looks like toast. It'll run great! For a very short time.

The math gets muddy. 250 for oem piston cylinder kit. My time is free mostly retired. New 550 is 600 with some major improvements. Saw belongs to friend with zero tolerance for tinkering. It's a tool has to work when needed.

 

[SteveSr]

scotchbrited the transfer out of this cylinder and added new meteor piston. Think it will run for long ? light duty firewood and 32/1 mix ?

( high res pics )

View attachment 1137256View attachment 1137257View attachment 1137258

Are those actual pits below the port or just shined up transfer? Scotchbrite is not good at removing transfer.

Checkout the first video especially...

https://www.google.com/search?q=rem...geGA_CAgcQIRigARgKwgIFECEYqwI&sclient=gws-wiz

 

[Pjohnson]

Do you have any idea why it over heated? I've been thinking about a 550 or 540 but have seen a few problems with them.

 

[dfh346xp]

Suspect bad fuel plus dull chain

 

[huskihl]

You’re not through the plating yet, but all those black spots are high spots where there is still aluminum and it needs to be removed. Also, if you could knock down the lines in the vertical scoring with some emory paper that would help smooth things out up above the exhaust port

 

[oldbuzzard]

New 550 is 600 … ??

 

[huskihl]

New 550 is 600 … ??

They range from about $540 to $700

 

[oldbuzzard]

Haven’t seen a new 550XP Mkll that cheap around here.

 

[huskihl]

Haven’t seen a new 550XP Mkll that cheap around here.

$530 plus shipping from HL Supply on the other forum

 

[dfh346xp]

Assembled and tested today , those suggesting very short runtime were correct - ran for less than ten minutes.

 

[J D]

What was it's mode of failure? Did you vac/pressure test it before running it?

 

[dfh346xp]

no vac or pressure test , not taking apart again, its on fb marketplace. The symptoms were the same as initial failure - not enough compression to start / run.