Posted by Janicholson on September 14, 2012 at 12:36:08 from (199.17.6.249):
In Reply to: How do you time a M? posted by BigTone on September 14, 2012 at 09:00:08:
Remove the plugs (easier to roll engine by hand). With your thumb in the #1 plug hole, or over the free end of a garden hose chunk to fit into the plug hole about 2' long, use the fan blades to turn the engine, (if it is a new engine this might be too difficult to turn)The A raised up rear wheel with the tractor in high gear TA ahead can be used if a helper rotates the wheel forward. Turn it till a rush of air begins to come out of the hole (not past that point). Now put a plastic soda straw into #1 plug hole down against the piston (feel for it). As you now turn the engine farther, the plastic straw will come up and out. As it stops moving, the piston will be at TDC on compression. The marks on the pulley will be aligned with the pointer for TDC. If not, move the engine back or forth to align the marks. This is the position for static timing the distributor, and the rotor should be pointing to #1 plug wire (1342 Clockwise around the distributor, 1234 from front to rear). Using a test light on the lead at the side of the distributor, with the key on, the light will be off, or on depending on where the timing is currently set. To set it accurately, the top of the distributor should be turned away from the engine until the light is off. If it is already off, the distributor top should be turned toward the engine. The exact point of correct timing is that rascally spot where the light is sputtering to be on or off. Lock the distributor hold down clamps and all is well. To assure the centrifugal advance is working, a timing light can be used to assure that the timing advances according to the book to a total advance as specified. If not, there is something amiss with the advance mechanism in the distributor housing under the breaker plate. Best of luck. Jim
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