Chris, I believe the 180 crank firing is done with extra moving magnets in
the flywheel, not separate stationary coils. Only one pckup. I'll go take
another look.
Chuck
From: Chris Reinhardt <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: [F500] Help I don't know what to do anymore
Date: Sun, 24 Sep 2006 17:01:44 -0700 (PDT)
Chuck, they have to have 2 different triggers to fire. I assume they are
180 motors and not twingles, so they fire 2x every crank rev, or every TDC
and BDC for each piston. If they were twingles, they would both rotate in
sync with each other, kinda like a big single and fire once per crank rev.
So there has to be 2 different pickups on the motor, one @ zero
degrees, (for example purpose) and another 180 out from that. One pickup
will fire one cylinder, and the other the other cylinder, that's where I
would look first. Is there timing marks on the flywheel? Bring the bad
cylinder up to TDC and and roll it counter clockwise till it lines up with
the pickup coil, and bingo, that's your sucker!!!
CR
Chuck Voboril <[EMAIL PROTECTED]> wrote:
This is a simple 2 cylinder wasted spark system and both plugs always
fire
at once. The fixed (stator) ignitor coil is a single winding if I recall so
one cylinder cannot have different spark timing from the electrical end of
things. Could look at the rotating magnet end of things in the flywheel, I
suppose. Could have a bit of metal stuck in there extending one magnet's
field forward.
The only other things that can make one side detonate and not the other is
unique leaner mixture, different squish angle in head, more compression or
more actual advance from the crank throws having shifted from each other. I
have heard of the last one happening in a very few rare cases.
Chuck
>From: Chris Reinhardt
>Reply-To: [email protected]
>To: [email protected]
>Subject: Re: [F500] Help I don't know what to do anymore
>Date: Sun, 24 Sep 2006 14:45:14 -0700 (PDT)
>
> John, I'm very familiar with 2 strokes and ignitions, not very much so
>with the F500 plants, but all applies, and I'm sure I will be corrected,
>but...
> How does that ignition layout, is there anything that's separate from
>one cylinder to the other? I'm thinking more like a bad CDI unit or
stator
>coil...
>
> CR
>
>John Vriesinga wrote:
> > John, if you're melting electrodes, I would sugest ignition woes...
>
>Are you thinking there is a spike in the current? What should I change?
>
>JV
> Get on board. You're invited to try the new Yahoo! Mail.
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