Reply To: Johnson tn-28 power issues

[Flambeau5]

Ok, so I think I found the issue. When I re-did the ignition I used part numbers for coils points and condensers I found on a different forum (wasn’t a member here) and it seems that the original points are about an eighth of an inch shorter from the pivot to where they ride the lobe than the new ones. I swapped the points to the old ones and that seemed to make it run much better at the top end. It is now pushing about 8mph instead of 4mph on my 14′ flat bottom. It is still hard to start and won’t idle but I think that is down to compression as the primer works without leaks. When I had the motor apart I did do a thorough cleaning of the fuel system. I still might look into a used but good powerhead if I can get it on the cheap the cylinders were pretty rough even after a light hone.

Thanks to all of you for your help and information.