Reply To: Johnson tn-28 power issues

[JOHN HOLBIK]

I put hundreds of hours on those Tn2 7 and tn28s back when I was a guide at our fishing resort. Very very reliable motors troll like a dream but load up with gas pretty quick when your trolling a short burst of speed and all is well the other thing is the drive spring goes south if you start spinning the prop in sand.I have a 1962 Gale 5hp and it is about the same speed as a TN The CD12 5.5 Johnson seemed like a race horse compared to the TNs.
Your motor sounds to me like the slow speed circuit is plugged unscrew the slow speed needle that is the one on the bottom of the engine with the bent end then pump your primer
and flush it out. Set it to about a turn out and turn in slowly as you set for slow speed
Do not not be hasty to change power heads your compression will probably come up the more you use it I have seen them run fine on 50 lbs with 16 to 1 mix.