Homelite Build thread

[sam bennett]

Cranks..
This is where things get fuzzy for me because the stamped number on the counterweight means almost nothing when trying to figure out what you're looking at.
 
Here are half of the cranks I have to work with. Based on appearance only, these are the either kart cranks, or the exact same crank used in a saw, or saw cranks only.

Karts had 1.50"/1.54"/1.60" stroke cranks. The 1.54" was used to stroke an 82/92, or came in the KL95 which had a different FW side bearing journal.



Here are 2 770D/775D large rod journal cranks. They are right hand drive and have 1.54" stroke. They never came in kart engines. Additionally, the FW bearing journal is large 11/16", and the counterweight has a fillet.



When building a Homelite I had to ask:
--Which direction do I want it to turn LH, or RH?
--What is the stroke?
--What journal sizes does it have?
--Does it have the additional counter weights?
--Does the FW end have a fillet?
--What size FW does it take?

All 3 of these cranks have 1.5" stroke and RH drive. The far left is from a Zip saw and uses a larger FW side bearing. It would work find in an R82/R92 with the appropriate timing plate.
The 2 on the right would be the most correct for an R82 only. 



Before I move on, I just want to show you how to tell if it's a LH or RH crank. With the rod journal at 12 o'clock look at the points cam.

LH crank.



RH crank. Keyway it too worn to use as-is.




The 2 types of cranks have either 7/16-20 or 3/8-24 threads on the FW end.



Important edit. I've tried to track down some saw part numbers. Remember we can't use the G cranks or the SW80.


Crank PTO steps down 9/16, 7/16, 3/8.

700G crankshaft A-57473
700D crankshaft is 56098-C
707G crankshaft A-57541
707D crankshaft A-57546
770G crankshaft  A-57541-B or A-57538-B
770D crankshaft A-57546-A
775D crankshaft A-58899
Super Wiz 80 crankshaft A-58892-B