I have an early 70's Craftsman "Shredder Bagger" (chipper, model 917.285761) that has a 143.226032 engine (Tecumseh V60-70233H. Vertical shaft 6HP 4 stroke, "L Head" I believe).
Pretty good shape, not used in about 4 years.
After degunking the carburator, it starts first pull even when cold.
I had to remove the carburator/disconnect the governor links. I don't think I buggered anything up putting it back together (ie: the links didn't get bent, they're _definately_ in the right holes).
Problem is it's running a trifle fast. I _assume_ it's supposed to be tuned to 3600 RPM. It seems to start out around 3800, and then slowly creeps up. Ie: 4000+ RPM after a few minutes.
No surging. Just smooth slow increase.
That's worrisome (the thought of those blades or a rod...).
So the assumption is that the governor either requires adjustment or is borked.
I've gotten the Tech manual for it, but as I've not had to fiddle with governors before, and I REALLY REALLY don't want to pull the crankcase apart to get at the internals, I was wondering if anybody might comment on the symptoms:
[If someone has the docs that say what the idle/fast speeds on this specific model _should_ be, I'd appreciate that too!]The governor arm (with the rod/spring linkage to the carb) is always "hard to" the "slow" side. If I gently move the arm counterclockwise (long arm towards the carb), the engine speeds up (even more). It has no travel CW (no movement right from dead vertical), and hence the governor _can't_ slow it down.
I haven't _yet_ tried to adjust the governor, I have to study the manual a bit more before that.
Does this sound like (just) an adjustment/external linkage issue, or would you think something inside borked?
I have no evidence (yet) that the internals will actually move the governor arm based on engine speed.
The governor linkage looks almost exactly identical to this:
The only difference being that the governor clamp(? short arm) and link (long arm) is at the 6 oclock position instead of the 3 oclock position in the diagram.
[Think of the long arm as the minute hand, and the short arm as the hour ;-)]The manual talks about swinging the clamp to 9 oclock, but only with motors