02-07-2017, 09:30 AM
this is somethjing mike saved that i posted who knows when. so i'm reposting here. i'll add to it as i feel like it the post was pretty basic.
MC10 conversion from saw
mc10 from saws is simple.
find and buy one mc1-70 or mc1-80
also find and buy one mc d44.
remove powerhead from both saws.
take head outside fan cover flywheel and shroud cover off d44 powerhead.
Chuck the rest except maybe the coil and inner cover especially the points.
on the mc1-70
break down powerhead rebuild engine with new bearings and piston sized for a nice round bore.
the crank is a mc10 1-70 or 1-80 crank all the same.
sell the outer cover and head on ebay or use on newer super series motor.
pick the nicer of the two flywheels if they are both mc10 style.
pick nicer working coil and inner cover.
if you use the d44 inner cover you'll have to copy the relief cut for flywheel wt. clearance at the top of the round bearing carrier that is in the block.
easier to see difference with both in hand.
stick motor back together with d44shroud outer cover and head.
voila mc10.
if you're really sneaky you can cross out the mc1-70 or 1-80 and restamp mc10.
no way to tell any difference then.
if you just want a really nice same spec clone you can use a mcs44a or mcs55a instead.
to almost anybody but me or ron cubel there is no difference.
the difference is the block lacks material for the relief cut to allow bigger counter wts of the later mc10 cranks.
it is visible outside.
the "true/real" mc10 block's have a cast in raised area around the pto side on the block for the flycut for bigger counter wt clearance relief.
the earliest mc10's were actually made from s55a's by jimmy y , but as of yet i've seen none in person .
dave
MC10 conversion from saw
mc10 from saws is simple.
find and buy one mc1-70 or mc1-80
also find and buy one mc d44.
remove powerhead from both saws.
take head outside fan cover flywheel and shroud cover off d44 powerhead.
Chuck the rest except maybe the coil and inner cover especially the points.
on the mc1-70
break down powerhead rebuild engine with new bearings and piston sized for a nice round bore.
the crank is a mc10 1-70 or 1-80 crank all the same.
sell the outer cover and head on ebay or use on newer super series motor.
pick the nicer of the two flywheels if they are both mc10 style.
pick nicer working coil and inner cover.
if you use the d44 inner cover you'll have to copy the relief cut for flywheel wt. clearance at the top of the round bearing carrier that is in the block.
easier to see difference with both in hand.
stick motor back together with d44shroud outer cover and head.
voila mc10.
if you're really sneaky you can cross out the mc1-70 or 1-80 and restamp mc10.
no way to tell any difference then.
if you just want a really nice same spec clone you can use a mcs44a or mcs55a instead.
to almost anybody but me or ron cubel there is no difference.
the difference is the block lacks material for the relief cut to allow bigger counter wts of the later mc10 cranks.
it is visible outside.
the "true/real" mc10 block's have a cast in raised area around the pto side on the block for the flycut for bigger counter wt clearance relief.
the earliest mc10's were actually made from s55a's by jimmy y , but as of yet i've seen none in person .
dave
Dave L.