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w-9 Timing Gears

D

David Novak

New User
Need a phone number of someone who has knowledge about the W-9 Timing Gears. My number is 301-884-7011. I have a W-9 I'm restoring. Had the tractor running but it has a cracked block somewhere in the front of the block. Before I take the timing gears off I want to make sure I know how they should lineup. The only dots I can get to line up are the camshaft gear and magneto gear. No other marks line up, no matter how may times I turn the motor over by using the crank. Keep in mind the tractor ran great with the with the gears lined up this way. email - [email protected] Thanks David
 
You can mark the gears yourself with a scribe.

1. Turn it so that the cam and magneto gear marks line up.

2. mark one of the crankshaft gear cogs... then mark the cam gear cogs on both sides of the crankshaft gear cog.

All set!
 
Just one more thing. When I turned the engine over using the crank. The dots only line up every other complete rotation of the engine on the camshaft gear and magneto gear. Whay is this.
 
The cam gear is exactly twice the size of the crankshaft and magneto gear. The cam needs to spin at half the engine speed to run the valves properly for a four-stroke engine.
 
Maybe you can help me with one more thing. After reading the service manual for the W-9 on how to time the gears, no where in there does it say anything about needing to time the idler gear with the crankshaft pinion or camshaft gear. It says in there that the camshaft gear is driven directly by the crankshaft pinion gear, but it is not, it is driven off the idler gear. This is where I have gotten confused when trying to time it from reading the manual. David
 
I don't have my book with me and it's been a long time since I've looked at the arrangement of gears on a W-9...

What is the idler gear between?

If it is between the cam and crankshaft or the cam and magneto gears, then it must also be timed. You can make the marks just like I described above - two cogs on one of the gears and then the one cog that goes between them on the other gear.


If the idler is between something and the governor gear, doesn't need to be timed. The governor of course does not need to be timed.
 
The idler gear is between the crankshaft pinion and the camshaft gear. It does have punch marks on it. The service manual says nothing about timing the idler gear.
 
(quoted from post at 10:30:25 06/05/08) The idler gear is between the crankshaft pinion and the camshaft gear. It does have punch marks on it. The service manual says nothing about timing the idler gear.
Click to expand...

Then it needs to be timed.
 
(quoted from post at 10:30:25 06/05/08) The idler gear is between the crankshaft pinion and the camshaft gear. It does have punch marks on it. The service manual says nothing about timing the idler gear.
Click to expand...

The timing marks on the idler gear will not necessarily line up with the crank and cam gears for every camshaft revolution. Depending on the design it may take as many revolutions as there are teeth on the idler for all the marks to line up again.

Generally if a single mark is on a tooth it will time with a single mark between the teeth on the other gear or between two marked teeth. Some gear sets use one mark between two and another mark between two. Other gear sets will use matching one mark to one mark and then two marks to two marks. You can tell the difference by where the marks are located, either on the tooth or between the teeth.
 
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