[AT] Starting Issue with MH Pacer

[charlie hill]

yep that's it Bo.  I don't think the one I have has such a
tight L shape as that one, more curved I think but basically
the same thing.  Since that works, it makes you wonder why
all of them aren't shaped that way or does that design make
it hard to fine tune the timing?  I don't know.

Charlie

-----Original Message----- 
From: Bo Hinch
Sent: Tuesday, September 02, 2014 10:28 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Starting Issue with MH Pacer

Charlie , have soldered many small brass wires on the end of a regular
rotor to make a sweep like in this picture
http://walcks4wd.com/rotor-v6-prestolite-distributor-cj5-cj6-commando-1966-1971.html
  in order to get a tractor and or forklift running when I could not
purchase the correct rotor . The engine will ALMOST start but regardless of
where the distributor is positioned , it will not run WITHOUT the SWEEP .

Bo Hinch in s/w louisiana


On Tue, Sep 2, 2014 at 6:10 AM, charlie hill <charliehill at embarqmail.com>
wrote:

> Alan,  your comment raises a question I've wondered about
> many times but never asked.  Occasionally I run across a
> distributor with a different kind of rotor button.  Instead
> of having a simple brass rod that runs out and sweeps past
> the contacts for the spark plug wires it has a rod that is
> shaped like a sickle, a long curved L shaped rig that is close
> to the contact points much longer, maybe as much as 10 degrees.
> I have always wondered why those rotors are out there and what
> their purpose is.  I think one of my D-14's has one.  I can't tell
> any difference as far as timing goes but it should make a difference
> of some sort.
>
> Does anyone know what I'm talking about?
>
> Charlie
>
> -----Original Message-----
> From: Alan Riley
> Sent: Tuesday, September 02, 2014 1:39 AM
> To: Antique tractor email discussion group
> Subject: Re: [AT] Starting Issue with MH Pacer
>
> Incorrect point gap will affect ignition timing.  When the points open
> with respect to crankshaft position determines when the spark is
> delivered to a particular plug.  Point gap determines the location on
> the ramp of the distributor cam lobe at which the points open.
>
> If they open further down the ramp from the peak of the lobe than
> they should, then ignition timing is retarded since the crankshaft
> has rotated an additional amount before the spark occurs.
>
> Conversely, timing is advanced if the points open nearer to the
> peak of the lobe than they should.
>
> Alan
>
>
>
>
>
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