I use a Sears 2-wheeled 5hp string trimmer to cut down heavy weeds on the
farm. Last week the engine threw a rod and knocked a hole in the
casing. She's dead, Jim.
Anyway, Sears wants $260 for a replacement engine which is about twice what
a small engine that size should cost so I'm going to replace it myself. At
5hp it tended to bog down in chest-high weeds so I'm thinking of using this
as an opportunity to upgrade to 6.5hp or a little larger.
I wasn't able to remove the pulley from the crankshaft, even after heating
with a blowtorch, so I couldn't measure the crankshaft specs. I know the
upper part of the shaft is 7/8" and it looks like it has only one key slot
but I can't tell how long the shaft is or whether it's tapered. Of course,
the local Sears tech was no help here.
The engine decal says:
Engine model: 143995002
Engine family: WTPXS 1851BA
This family is quite different from the other Tecumseh codes I've seen and
a search on Google returns only a couple references to the WTPXS family and
none of those appear to list any specifications.
Anybody have a document with the crankshaft specs for this engine?
http://www.sackheads.org/mayfield email: email@example.com
My mail provider does not welcome UCE -- http://www.sackheads.org/uce