On Wed, 15 Mar 2017 12:46:38 -0000 (UTC), Tim+
wrote:

MM wrote:
Does the puller shown on the right in this Screwfix product look like
it's suitable to remove the flywheel on an old Suffolk Punch 35S
lawnmower engine?
http://www.screwfix.com/p/bearing-se...r-puller/19315

MM


Hmm, don't think so.

If it looks like this
http://www.oldlawnmowerclub.co.uk/si...lk%20Punch.pdf

Exactly that, yes.

then I would hazard a guess that once you've removed the recoil starter and
pawl sub-assembly you might be able to screw bolts back into the two holes
in the flywheel on either side of the central left hand thread nut (once
you've removed it of course) through a short bar across the end of the
crankshaft. This should "push" the flywheel off the crankshaft.

Trouble is, I don't have any short bar or equivalent. So I thought by
the time I've gone to the hassle of locating a short, thick bar, or a
longer strip of 10mm stock I can saw down, I might as well look for a
suitable puller instead. There are numerous "universal" pullers for
this type of small engine on eBay and on Amazon. some with several
holes for the twin screws, others with elongated holes to adjust to
the appropriate pitch. Some don't have a threaded centre screw to push
against the crankshaft, but I think are intended to use two nuts on
each of the two bolts. You screw the bolts into the holes in the
flywheel, arranging the nuts either side of the bar. Then you unscrew
all four nuts and this has the effect of pushing the flywheel off --
with a judicious tap on the end of the crankshaft to break the taper.

You could even re-use the pawl hub sub-assembly (part 123) with something
to block the central hole packed behind it.

I did read on one of the mower websites that a 2p piece is exactly the
right thickness.

MM