Deere 2 cyl timing issue

JOCCO · Apr 29, 2017

A 2 cyl was rebuilt but not finished. (enter Jocco) It appears the cam and crank ARE NOT IN TIME. GOING BUY NORMAL LH exhaust and impulse marks. I was told there were no marks on the cam and crank on this one. Anyone give any advice on how to time them. The exhaust mark is lining up as the valve begins to open. But impulse is at or near bottom dead center!!! I posted this on the Deere forum as well Thanks all

LarrySTN · Apr 29, 2017

It sounds like the cam is timed properly, but the governor shaft is not. The best way to tell on cam timing is to have the left cylinder intake and exhaust valves rocking (overlap) with the left hand cylinder on top dead center. If this is correct on your tractor, the governor shaft is out of time and is relatively easy to correct.

old · Apr 29, 2017

What model that can make a difference or at least I would think it could.

Paul from MI · Apr 30, 2017

I agree with LarrySTN. If the flywheel is timed correctly to the crank( there are marks on both to indicate the correct position), then the cam and crank are aligned properly if the LH exhaust valve is just starting to open when the "LH exhaust open" mark is in line with the mark on the crankcase. This seems to be OK. What is not timed correctly is the governor gear to the cam gear. With the "LH impulse" mark in line with the mark on the crankcase the mag drive slot should be horizontal. If not the remove the governor enough to reset the gears. Without knowing what model you are working on, I can't get more specific than that. Get a manual, it'll help a lot.

Deere 2 cyl timing issue

JOCCO

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LarrySTN

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old

Well-known Member

Paul from MI

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