Johnson-63 3HP, Air gap between flywheel and ignition coil?

[TFO]

Have an old Johnson 63 3HP outboard engine that runs like a charm. Lately one of the ignition coils started to spark through a crack in the plastic cover of one of the ignition coils. Tricky to find since the "leakage" depended on temperature and RPM. (At a low RPM it run on one cylinder only)<br /><br />Once replaced - What is the best way to adjust the position of the ignition coils?<br /><br />What should be nominal air gap between the flywheel magnetic surface and the coils?<br /><br />With age the play of the crank shaft may affect both the coil air gap and the ignition contact points. How much play should be accepted?

 

[Xcusme]

Re: Johnson-63 3HP, Air gap between flywheel and ignition coil?

FS322, Welcome to iboats!<br /><br />Click on this link for more info....<br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=28;t=019445#000005

 

[TFO]

Re: Johnson-63 3HP, Air gap between flywheel and ignition coil?

Thank you Xcusme <br /><br />Have noticed the machined edge where the coils should be lined up but wondered if the was some smart trick to line them up without a special tool and if they should be some distance back from the edge. Considering some crank shaft play a meassure of the resulting air gap between the coil and flywheel might be needed. Will try with a gauge blade of of minimum 0.5mm (0.02 in) to see how it looks.<br /><br />Thanks for the help