cub problem. HELP!!!!!

Here's The Cub's cam gear installation view. Hal

It sounds like you know what you're doing, and that gives me an awful feelin' that when they put her back together after the bore job, there's a possibilty that the timing gear train got put back out of time.

The Cub has an idler gear in that train that the ABC's don't, and the timing marks for the cam and governor drive gears are on the rear of those gears. Possible somebody missed those, or one of the others.

I worry a little also because I saw a thread the last night or two (admittedly about a newer tractor that I have no experience of) that was advising to center the tooth with the single punch mark into the notch on the next gear with two marks. I bit my tongue, because I don't know the engine they were talking about, and that may have been just right in that case. But on the Cub, one lines up to one, two to two.

Obviously, PLEASE, eliminate every other possibility before you chase after this one, as it could mean an AWFUL lot of work just to check it out. Yeah, I've got an awful feelin', but it may be, and I hope it is, something much easier.

The easy ones are the easiest to overlook!

Keep us posted.

Are you sure it was timed on the compression stroke with No1 piston at TDC? Hal
PS: Check that suction on the carb when you hold your hand over it when cranking. Make sure the valves have enough clearance too.

When you hold your hand over the throat of the carb your hand should become wet with gas. This should pull the atomized fuel into the combustion
chambers too. You need good intake manifold vacuum to do this. Run a compression check on the engine.

When cars and trucks used mechanical fuel pumps we used that procedure to see if the fuel pumps were bad. You could actually start them as long as you kept that carb covered. Hal