[AT] Starting Issue with MH Pacer

[Charlie V]

What you said, Alan, about your point on points.  I agree with your last
statement, but was not going to mention the first post.  Used to get into
that regularly on garden tractors and lawn mowers.  Used a continuity
tester to pin point exact breaking point on snowmobile point, as related to
piston TDC..

Charlie V.


On Tue, Sep 2, 2014 at 1:48 PM, Alan Riley <arr44 at suddenlink.net> wrote:

> Well, I knew I shouldn't have posted this late at night.  After a
> couple of cups of coffee this morning, I reread it and realized
> the last 2 paragraphs are backward from how I meant for them
> to read.
>
> Suffice it to say, when the points are gapped too wide, they open
> sooner resulting in the ignition timing being advanced.
>
> Also, when  the points are gapped too close, they open later resulting
> in the timing being retarded.  This is the same effect as when the
> rubbing block wears down.
>
> Now if I still have it messed up, fire away!  I can't run any more
> but I can still duck!
>
> Alan
>
>
>
> -----Original Message-----
> From: Alan Riley
> Sent: Tuesday, September 02, 2014 12:39 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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