Thanks man wasn't as crazy cheap as yours unfortunately but all good I'm happy. And thanks was allready a 82cc member but not the old type.Welcome to the club Homie I’m happy for you.
Good job Vinny how do ya like that red barn piston?Today worked out well for the cold weather. Yesterday i got a box of parts from bob johnson!!!!!!
Today i got the sp70 together and fired it up. Turned out very good. There were a lot of small screws missing or stripped. But sorting thru my peanut can of screws i had enough to get it together. It now wears a 24" bar and runs like a new saw. It should though. I was surprised. The new piston that bob sent was from lil red barn?? So i had to reuse the wrist pin. But it is a great runner. I made a few cuts and im very happy with it.
Then i moved on to the 6-10a, after some tinkering, i got a new piston in it. With a much better ring gap than what was in it. Its a great runner and fired right up no issues. I likely could have not replaced its piston but i had a new one and it was going to good useage.
Its a shame that mac didnt survive, or that they werent copied. Wonderful machines that continue to impress.
Thank you Ron I love these little bits of information.Jethro,
MAC used to market a long bar kit for the 850. It was primarily A/V mounts without the holes. At some point the solid mounts became standard.
Good job Vinny how do ya like that red barn piston?
Well, so far ive had good luck with them. Theres been one in my first mac saw from day one. I put one of them into my sp81. Its been thru many tanks of fuel in the few years ive had it. The wrist pins are the issue. They are not the proper size and you must reuse the originals. Not a big deal. Its out anyway, not like its extra work. But its lasted this long. I am not concerned about it.
I remember that, didnt he eventually tear up the cylinder pretty bad?We had a visitor dropping this thread a while back that installed a LRB piston in an 800 or 850, he couldn't figure out why the wrist pin kept sliding over...not sure if we finally convinced him he had to use the original to properly fit the bore of the rod.
Iv'e seen that done to old snowmobile pistons, here's another take on that concept this piston was in a 1969/70 race motor.I was taught years ago to "crosshatch" a piston much like honing a cylinder to help with oil retention. Is there any harm..... or good in doing this as far as you guys are concened?
I agree 100% Mark, I was talking about the piston itself.It was/is a common practice to hone or otherwise deglaze an iron bore cylinder, not recommended for a chrome bore.