Setting the timing on a 12hp
 

So I almost hate to even ask this question but where do I look to see the "S" on the fly wheel? I only see one whole on the S/G side of the engine that could help me here but I've turned the crank over and over and only see white and yellow marks? I have a timing light and need to tune up this cub. After this I'll get the carb tweaked as well. I've read both guides in the tech section on this forum but for the life of me cannot find this "S" :bash2:

It is there. It is probably rusted over making it difficult to see. Sandpaper used to scour away the rust & polish up the edge of the flywheel will help.

Holy cow this was hard to see! So there seems to be some scratch marks above the s. Looks like the PO put them there? Do I use them? One post I read someplace said I should do something like this.

I put white out on my s mark , paint works too

Ditch the timing light and follow the procedure in the link.
http://www.onlycubcadets.net/forum/s...ad.php?t=33461

Questions on setting timing.

So first let me explain what I have done and then where I'm at. I first gaped the points to 20 like all the guides and manuals say which is to be a good starting point.

Then I found the compression stroke by first (finally!!!) sighting the small S on the fly wheel. With that in sight I spin the fly wheel till I see the points opening up and the S in sight. This was the process I read in one of the guides.

Now by either using a meter or light I'm suppose to rotate the flywheel slowly till either the light goes on using the light method or the meter moves. At which point I see if the S is center in the sight hole.

So before I even ask any questions, am I correct so far? It makes no sense to ask a bunch of questions if what I'm doing up to this point is not correct. If it is then I'll start typing some more :biggrin2:

Read these

http://www.onlycubcadets.net/forum/showthread.php?t=14
http://www.onlycubcadets.net/forum/s...ead.php?t=4405

[QUOTE=garnold;281864]

Now by either using a meter or light I'm suppose to rotate the flywheel slowly till either the light goes on using the light method or the meter moves. At which point I see if the S is center in the sight hole.

QUOTE]

Well, yes but NO! When turning the motor, you need to observe the light or meter go OUT! The "S" mark on flywheel is where the point just about open breaking the connection to the test light. Make sure you're turning this motor in correct direction as you do this which is clockwise when you're facing the flywheel.

[QUOTE=Billy-O;281875]Yes, correct this was what I was looking for. The light turning off and/or meter showing now an open circuit which would indicate that the points have now opened. I also turned over the engine and watched the direction of the clutch just to make sure I was spinning the engine in the correct direction :biggrin2:

NO........ both wrong.

Read it again. Use this one. http://www.onlycubcadets.net/forum/s...ad.php?t=33461

Put the "S" mark in the window then:
There are three descriptions that have been linked. I think they are all 3 good depending on you level of ability...... of course I am partial to the one I wrote.:biggrin2: