1972 Johnson 100hp pulling a tuber

[jhetrick55]

I've got a '72 Johnson 100hp electric shift engine on a '72 Glastron V176. Since I got it, it has always run fine. However, at the end of last year I was trying to pull someone on a tube and every time I gave it throttle with the tuber hooked up it would die. Someone suggested maybe it is the timing. I'm a novice and don't pretend to know much about timing other than the basics. Does anyone have any thoughts about this diagnosis being right and/or how to adjust timing on this engine?

 

[F_R]

Timing doesn't change by itself.
However, on a related subject, the timer base may be sticking. Fairly common.

 

[jhetrick55]

If the timer base may be sticking, what is the best way to free it up?

 

[jhetrick55]

When I get home today I am going to do more investigating about how the timer base moves as I increase throttle. I am thinking I may have some dried grease.

one other question I have - is there any reason on this engine to use anything but the manufacturer recommended spark plugs?

 

[F_R]

Motor came with L76V surface gap plugs. You won't find many people that love those. Most use the optional plug QL77JC4