I wonder if soaking over night with atf and then draining/refilling with normal oil might free up stuck rings?
I have limited experience inside an engine and a couple of stupid questions. 1. If the bore isn't too bad I might be able to re-ring the piston. Would that be with the same size or the next size wider rings? 2. Doing the valves? Is that just lapping and adjusting or would it involve seats and guides?
Try pouring an ounce of MMO through the plug hole when the piston is down abit and let it sit for a few days. For overhauling, You can go to the length you want. When I do a "swamp yankee refresh job" on a cheap old engine I: disassemble and clean the engine, inspect all wear surfaces, ridge ream and hone the cylinder(if it is less than 0.008" over I reuse the piston and rings), clean the piston and ring groves, clean each ring and then rub with croacous cloth lengthwise, clean and lap the valves, grind the valve lash to 0.002" less than is called for(this allows latter correction), assemble with new gaskets and seals, overhaul the carb and clean the tank, fill fluids, run for 15 to 30 minutes and change the oil. I've gained many years this way without spending more than the $20 for the gasket set. Find a freebie lawn mower to practice on first. The B&S Repairmans' Manual(jn our Manuals Section) is excellant. Good Luck, Rick
Edited by boyscout862, May 16, 2016 - 07:19 PM.