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

[Edd Payne]

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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