[SEL] FM Z 3hp trouble

Tom Smith tsmith at hal-pc.org
Thu May 5 18:27:33 PDT 2005


Hi Ed,

Thanks for the info. I will definately get the aluminum bracket if I can't 
make the steel work. I messed with it some more tonight and found if I 
reversed the running direction (from what is indicated in the manual ) and 
rotate the timing gear 180 degrees, it comes pretty close to what should 
work. I'll have to mess with it some more to tell if this is going to do the 
job.
BTW, you were the only one to reply.

Have a nice weekend,

Tom


----- Original Message ----- 
From: "ED" <edstoller at earthlink.net>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Thursday, May 05, 2005 7:38 PM
Subject: Re: [SEL] FM Z 3hp trouble


> Hello Tom,
>
> I have a 2 HP FMZ and got a new, aluminum, bracket from Hit & Miss, Ed 
> Dies.
> I had a problem mounting the type R mag and wound up enlarging the holes 
> in
> the needed direction to get everything to fit.
>
> Ed Stoller
> New Fairfield, CT
>
>
> ----- Original Message ----- 
> From: "Tom Smith" <tsmith at hal-pc.org>
> To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
> Sent: Wednesday, May 04, 2005 10:39 PM
> Subject: [SEL] FM Z 3hp trouble
>
>
>> Hi List,
>>
>> I'm a newbie and have run across a problem with a FM Z 3hp engine. I have
>> restored the once very stuck engine and couldn't find a replacement for
> the
>> busted pot metal gov. housing/mag base. I was able to locate a earlier
> cast
>> iron unit but then found I couldn't use the Fairbanks "R" mag without 
>> some
>> fairly heavy modification to the base. I then bought a Bosch mag thinking
> my
>> worries were over. It mounts fine but when I got the timing right on the
>> exhaust (per the manual), the little stud that trips the mag appears to 
>> be
>> firing the mag near bottom dead center.
>>
>> I transferred the gear marks to cam relationship from the replaced set 
>> and
>> the valve timing appears to be on the screws so I can't figure why the 
>> mag
>> timing is wrong. Its almost like I have to rotate the mag timing gear
>> relative to the cam to get the spark timing right. The manual assumes I'm
>> running the later R mag and doesn't give spark timing numbers (only
>> alignment position of the gear tooth marks). If I have to jack with the
>> timing relative to the exhaust cam, it looks like it may be a bit of 
>> trial
>> and error (mostly error).
>>
>> What gives?? Any help greatly appreciated.
>>
>> Tom
>>
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>>
>
>
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