hmmm,
i'm a little lost here terry b.
i thought that the d44 was the only parts saw to use on the mc10 clones for PARTS ONLY.
they are NOT a complete mc10.
seems the early d55 also have those parts?
i am too lazy to look up the d55 specs but is the crank is the same as d44 also?
on d44 the crank con rod bottom has only 22 bearings unlike the later mccullochs which have the classic 24 bearing set up.
they also are a shorter stroke and smaller piston.
perfect for mini bike or play kart motors
thats something i have to do thats on back burner.
i have a few d44 short blocks saved for that idea.
a final note the mc1-80 i believe was before the mc1-70.
in a few extremely rare cases you will find them fitted with mc10 everything.
finally,
A story i heard? read? about the mc1-60 and possibly the mc1-80 as to why they changed the heads.
on the mc1-60 it was an early standard saw with the head reversed from what we see as normal.
no square access hole and black cover plug , just a nice smooth yellow top.
the next year it was flipped around on all saws .
the was because the spark plug was to close to operators hand in original location.
in the right conditions you'd get "rapped" in the hand with the engine spark.
the mc5 kart motors all had the smooth tops .
on the mc10, its never been clear to me if the spark plug rap was the culprit on the switch to side plugs.
very possible or it might have been lets make everything standard in casting to save money.
ok that's enough for now i really should be getting things done.
hope this helps people know a little more about this stuff,
dave l
Dave L.