[SEL] ArrrGGhhh! I'm back after 6 years lurking - re: FMZ gears

[Al Harris]

Firstly, I have no relatives that I know of in "mexico".

Secondly, a 25-50-12 setup is going to put your timing out isn't it, by 
2 teeth per revolution.

Don't you need a 25 tooth maggy gear running off the 50 tooth cam gear.

Cheers,

Al Harris
Summer Clarence Coast NSW Oz

al.harris at rustic-engines.com



Graham Harris wrote:
> Dammit 6 years of lurking ends just like that...I can't even remember how to post!
>
> Al Harris, I went down to my shed and counted the helical teeth remains on my ZAA gears for yer. All 3 are rooted but countable - 48 timing, 24 pinion, 11 governor.
>
> Now to fix my Z, I'd have to find 3 helical gears pretty well inmpossible so will be replacing with straight cut gears because my FMZ S/N is right near the change back to straight cut gears (1925). It's a rotary mag and therefor all I'd have to find/make is a 12 tooth governor gear which is 1.2" + 100 thou diameter for 12 teeth 10pitch. 25-50 tooth 10 pitch gears are pretty common for 1-1/2 HP engines, machining work needed though. 25-50-12 in straight cut keeps the correct centre distances.
>
> By the way - could we be related?
>
> Graham Harris, Melb, Oz
>
>
> From: Al Harris <al.harris at rustic-engines.com>
> Subject: Re: [SEL] FMZ Gear and Timing questions.
>
> You must remember, I was more confused by the fact that my crankshaft 
> gear has 24 teeth on it. So I was trying to count 48 teeth on the 
> straight cut gear in the picture. :-(
>
> Cheers,
>
> Al 
>
> It's cleared my vision though, thanks fellas. ;-)
>
> The sad part is that a 48 tooth diagonally cut FMZ cam gear has not come 
> into sight. :-(
>
>
>
>