tom3
Lawn Addict
- Joined
- Apr 9, 2018
- Threads
- 25
- Messages
- 1,579
Have an old early 80s JD self propelled mower, perfect machine for me. Old original engine started making noise, using oil, then losing power. Tear down showed the aluminum bore scored up bad, piston in bad shape too. Replaced it last spring with a basic NOS shortblock. with new internal drive components, eliminated the points. Pretty much disaster. Ran it for 1- or 15 minutes and drained the oil, silver colored with aluminum flake. Ran it through the summer, 10 or 12 hours, 5 oil changes. Every change the oil was full of the same metal flake, silvery stuff. Ran fine to start with but at the end of summer the engine was smoking and using oil, losing power. Same result as the old block I'm no master mechanic but I have been wrenching on engines for a while, it was done right. Used Briggs&Stratton 30wt oil in the new motor, $20 worth for about 10 hours run time. So, is there a trick to getting these Kool Bore engines to live? Is the Briggs oil really right for these engines? I read the new oils are not what they used to be. I'm really just lost here.