Posted by ScottyHOMEy on December 24, 2008 at 22:32:07 from (71.241.192.131):
In Reply to: c123 governor posted by RDJ Farms on December 24, 2008 at 18:00:25:
There's a way to do it without pulling the front cover. It involves some variables, like whether you have a battery ignition or a magneto and whether the motor or the ignition have been moved.
Keep in mind that the marks Jonathan described on the cam and governor gears are to be in register with the motor at TDC on the compression stroke, so when the motor is in that position, the mark on the cam gear, even if you can't see it, will be at the point where it should mesh with the governor gear.
IF neither the motor or the ignition has been disturbed, you should be able to put the gear directly back in, with the slot and the lug between the gear and the ignition drive lined up. It would be preferable for the alignment marks between the two gears to line up, but if everything else is in place, there's no harm in that gear being exactly 180* out. It would be advisable to re-time the ignition afterward in case you are off by a tooth, especially with a mag, but it should be close enough to run. One further caution, though, with a mag. Use your electric starer, NOT the hand crank, to start it afterwards and until you have loosened up the mag for the final adjustment -- if you should be off on the advance side, that crank can kick you.
Just to verify that it worked, with the gear in place and the ignition off, you can then turn the engine by hand (much easier with all four plugs removed) until you have #1 at TDC on compression. At that point, if nothing was moved while it was part, the marks on the governor gear should either be meshing with the cam gear or 180* across. If the mark should be on the opposite side, then pull the gear back out and try the mirror as Jonathan suggested to see if you can see the mark on the cam gear, which should be just at the point where it meshes with the governor gear, and can then line up the gears according to the marks. It couldn't hurt to make a mark on the body of your mag or distributor even with the tower for your #1 plug wire, then pop your distributor cap to verify that the rotor is pointing toward #1. If it is, the most you will have to do is the routine timing adjustment, just in case you are off by a tooth on the gears.
If it is not pointing to #1 when the motor is at TDC, then one of two things happened. If it is pointing to #4, there's a good chance you had #1 at TDC on exhaust instead of compression. With the governor gear in place turn the motor by hand to verify that you are indeed on compression on #1. If the rotor is still not pointing to #1, pull the governor gear back out and turn the ignition until the rotor is pointing to the mark you made for the #1 wire. (You may have to remove the mag to do this, but a battery distributor should turn easily in place.) Then replace the gear with the marked tooth meshed as closely to the cam gear as it can be.
Again, at this point, all you should need is to make the regular minor adjustment to your timing by either turning the mag on it's mount or the distributor.
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