[SEL] FMZ Gear and Timing questions.

[Judge Tommy Turner]

Yup.  On Al's blow up the problem is between teeth #25 and 30.

Tommy Turner
Magnolia, KY



----- Original Message ----- 
From: "John & Beryl Cooper" <cooperjb at aapt.net.au>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Tuesday, December 02, 2008 7:31 PM
Subject: Re: [SEL] FMZ Gear and Timing questions.


> Hi Al,
> There are 50. Enlarged 400% and counting anticlockwise from  the pin 22 
> has
> a white dot, 33 a red dot and up to 50. The confusion seems to be in that 
> 5
> o'clock area where the angle changes.
> John
> Bega NSW Oz
> ----- Original Message ----- 
> From: "Al Harris" <al.harris at rustic-engines.com>
> To: "SEL" <sel at lists.stationary-engine.com>
> Sent: Wednesday, December 03, 2008 7:08 AM
> Subject: [SEL] FMZ Gear and Timing questions.
>
>
>>
>> After considerable amounts of thought have left me brain dead I pose
>> these two question to the group.
>>
>> Humor me as I am not an injunear. Once upon a time I cou'nt even spel
>> injunear.
>>
>> Harry's Old Engine #6 here:
>>> http://www.old-engine.com/fairbnk2.htm
>>
>> is a 1922 model with straight cut gears with 51 teeth on the cam gear,
>> count them here:
>>
>>> http://www.old-engine.com/image/engines/fairbanks/IMG_2421w.jpg
>>
>> OK, my first questions about Harry's engine and parts picture. How many
>> teeth are on the crankshaft gear so that two revolutions of this gear
>> revolve the cam gear exactly once, so that the timing does not slowly
>> get out of sequence ? 25.5 ?
>>
>> My second question is: my 1923 model has a diagonally cut  crankshaft
>> gear  with 24 teeth, how many teeth must be on my cam gear when I
>> eventually find one. Has anybody got one and can count the teeth for me.
>>
>> More importantly, has anybody got the correct cam gear, cam  and
>> push-rod that I need to get my engine running.
>>
>> BTW my assumption is that it *can't* be 51 teeth, as two turns of the
>> crankshaft would only turn the cam gear through 48 of its 51 teeth. We
>> would end up with slowly retarding timing, right?
>>
>> -- 
>> Cheers and TIA,
>>
>> Al Harris
>> Summer Clarence Coast NSW Oz
>>
>> al.harris at rustic-engines.com
>>
>> _______________________________________________
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>> SEL at lists.stationary-engine.com
>> http://www.stationary-engine.com/mailman/listinfo/sel
>
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