Timing a 340

Anonymous-0

Well-known Member
Need to check the timing on my 340, is there a timing mark on the front pulley, or is it on the flywheel? Also, whoever worked on this last had the plug wires on the cap in the right order but wrong direction so I'm not even sure no 1 is where it should be.
 

billde,

Do you mean backwards as in the #1 plug goes to the rear cylinder?

The neat thing about 4-cylinder engines is that you can time them in either direction. #1 could be the front or the back cylinder. As long as you line that mark on the front pulley up with the pointer with your chosen #1 at TDC on the compression stroke, and connect your wires accordingly, it'll run like a top.

#1 is traditionally the front cylinder, BTW. If you're static timing a rebuilt engine, just for kicks set it up with the rear cylinder as #1. Makes the next guy who gets your tractor's life interesting, if you're into that sort of thing :)
 
The normal location for the wires (looking from rear to front of tractor) is
2-1
4-3
Distributor rotates CW, gap is .020".
JimN
 

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