Johnson 1950 TN25 5-Horse "Greenhead" Points Gap

BiffG

Recruit
Joined
Sep 20, 2013
Messages
1
Am rebuilding 1950 Johnson 5-horse TN25 with neutral lever. Rebuilt carburetor, replaced soggy cork float with wine cork, works fine now. Also replaced impeller.

Attempted to adjust points, but now am getting backfire at lower RPM setting (anything less than the "Start" mark on throttle). I am sure there is a specific procedure to setting the points gap that involves where the rotating magnet (on the shaft, not the flywheel) and the throttle are positioned, does anyone have it handy?

Thanks!
 

nwcove

Admiral
Joined
May 16, 2011
Messages
6,293
Re: Johnson 1950 TN25 5-Horse "Greenhead" Points Gap

dont quote me on this, but set the points at 0.020, and the ls needle needs to be set at 5/8 turn out from lightly seated.....it can be very sensitive to small adjustments.

and welcome to iboats!!!!!
 
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