Well you and Racer can both be wrong on this one. A little more knowledge on your part would go a long way. Those motors failed after long term storage not while they were running. That is no secret. As fars as oil technology goes McCulloch was running 100-1 on their oil back in 1964.
Well also from what I was told, it all changed when Yamaha entered the market and omc had to react. I was told Yamaha was the first to silver solder their main bearings and changed all their tolerances. Most at the time would preach that the Japanese never invented anything, they were just better at perfecting it. I don't have the true knowledge of dissecting everything and forming my own decision, I just know what I was told.
I have a Yamaha 8hp, it runs on 100:1, many years, no problem with it!
What if it is 68 of compression on both cylinder? what should I do?
My McCullochs were running 100-1 on factory oil in 1964. No special bearings then. It was just good quality factory oil and never had a problem. So yes easy to prove me being right. My McCulloch was rated 75 hp at 5600 rpm.
68 is really low so probably your problem. Did you ever check with a different tester? Also, your engine won't start/run with the missing primer plunger (knob) unless you plug the rubber tubes going to it or pinch them off somehow. Now without the primer it will be even harder to start...so what I would do, and I'll surely catch hell for this, is use a tiny bit of starting fluid. Don't keep it running with it just see if it gives enough to get it going. At this point I'm not sure you have to much to loose.The problem is, it won’t start
Found this article about Mr McCullochs life and what he created. Definitely proves what Flyingscott was referring to. Found it interesting learning about the history of him and everything he made....including his own oil. Not sure fixing the bridge was his best move.
Scott, you would have to re-read the very long post (and he has two posts for the same motor and issue)and look at what he's done. Sometimes he could start his motor at home but not the marina. He didn't know what a primer was and pulled the plunger completely out and lost it. To top of off, pretty low compression.
is the #33 low speed screw? Or #15? how do I adjust it right? I had it turned tight
Thank you, I did that, still wouldn’t start, I did spark test, it has electric, I bought the starting fluid to try, it still dead, I can’t find another test kit for the compression test today, may be have to ask my friends!
That's a lot of questions. When transporting, you can set it anyway you want. Take a picture of the front and the id tag and post.
Here are the pictures
Not that it matters but that is an 1988 not a 1989. Your knob is still missing, did you plug all the lines coming and going from the primer? Those were excellent running motors but if you have bad compression or bad spark or fuel issues it's not going to run.
