Joe is right on the mark. I might add the caution that there are are two TDC
positions in each rotation of the crank. Be sure you have the one where
cylinder 1 is ready to fire and not the other one. One way is to watch the
valves, the intake and exhaust valves are both closed for the compression
stroke as you approach the firing position (crank turning forward, of course).
John Young
MK 2 Spit
Indiana
--- On Tue, 11/11/08, Joe Curry <spitlist@cox.net> wrote:
> From: Joe Curry <spitlist@cox.net>
> Subject: Re: [Spits] mk1 timing
> To: "'Steve Beswick'" <stevebez@gmail.com>, spitfires@autox.team.net
> Date: Tuesday, November 11, 2008, 4:38 PM
> The Mk1 has one timing mark on the pulley. It indicates
> TDC. You set the
> timing by adjusting the vernier adjustor knob on the
> distributor to change
> the timing in 1 degree increments.
>
> Start by turning the crankshaft so that Cylinder 1 is at
> TDC and rotate the
> distributor until the points are just beginning to open.
>
> Tighten the clamp and adjust the vernier 13 clicks
> clockwise to achieve the
> 13 degrees BTDC that is recommended.
>
> Note: Make sure that you have sufficient adjustability
> range of the vernier
> before you start.
>
> Joe
>
> How do I check / adjust the ignition timing on a mk1
> Spitfire? Where
> are the timing marks?
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