dont mill with an MS391

[ZinTrees]

blew dads 391 a few weeks ago while milling

side question, does anyone know how expensive/hard it is to replace the top end on a 391?

 

[Walkdog]

The clamshell saws require more disassembly than pro saws but it isn’t that difficult to replace a top end. Cost will depend on whether the oem cylinder is salvageable or not.

 

[ZinTrees]

I looked at the bore thru the spark plug hole, itll catch a small flathead screwdriver, but not super bad, and only in a few spots, hoping we can just sand it, and replace the piston

 

[Mad Professor]

Don't mill with < 90cc saw.