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

[Al Harris]

Right Edd, thanks. I was confused by the term pinion (automatically 
thought the pinion was the gov offshoot). I'm confused by a few 
terminologies actually. Spindle, pinion, with thread, with shaft 
...arggggg. I'll get my head around it soon, I hope.

I was about to check FM maggy status with Graham, as I have an FM-J with 
diag cut teeth, but there's 22 of them. That wouldn't work on a 48 or 50 
tooth cam gear. Now I'm wondering what FM engine it fits. :-(

Cheers,

Al Harris
Summer Clarence Coast NSW Oz

al.harris at rustic-engines.com



Edd Payne wrote:
> Hay Al read his post again,the 12 teeth is the governor gear.
> EDD PAYNE
> PO Box 364 Gulgong N.S.W
> Australia
> 2852
> Phone:0263742387
> edsengns at optusnet.com.au
> edsengns
> ----- Original Message ----- 
> From: "Al Harris" <al.harris at rustic-engines.com>
> To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
> Sent: Thursday, December 04, 2008 2:06 PM
> Subject: Re: [SEL] ArrrGGhhh! I'm back after 6 years lurking - re: FMZ gears
>
>
>   
>> 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. :-(
>>>
>>>
>>>
>>>
>>>       
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