Pro mac 60 - high compression
I'm a newbie. I don't know much about chainsaws, and I haven't had time to read all 111 pages of this thread yet, so if I'm covering an old issue, please forgive me.
I came into possession of a McCulloch Pro Mac 60 is seemingly excellent condition and well stored.
Emptied the old gas (was mostly empty), washed it with new gas/oil mix (proportion unknown), poured it out, and filled it half way (in case the proportion is wrong, so I can still add gas).
Replaced the chain oil with SAE 30 Penzoil, not synthetic though. The cap says SEA 30 on it, so I figured that was OK. The oil I poured out was reddish. I hope it wasn't transmission fluid! Got the chain lubricated, and it moves smoothly manually.
Spark plug is clean as a whistle and has good contact and wire.
Ready to start.
Won't start, of course.
Rope pull is way tough. Figured the cylinder was dry.
Pulled out the spark plug, sprayed light oil in cylinder. (Is that a bad thing to do? I figured it would burn off soon enough.)
With plug out, rope pulls all the way out and cylinder moves easily.
With plug in, the pull is ridiculously hard and rope only comes out part way. I will break the rope if I keep it up.
Seems like the compression is way too high.
Found this thread:
http://www.arboristsite.com/chainsaw/175567.htm, which talks about some decompression valve sticking. Ahem, what's does a decompression valve do? Do I have one? Where is it?
Haven't taken the muffler off yet. Going out to do that now.
In the meantime, any ideas, anybody?
Is there any good description around here on how to do a drop start? I've seen it done but have never done it myself. Looks tricky.
Thank you for your kind attention.