Ok so i have this 1989 20hp Johnson (TJ20CRLCEM) that surges once i get above about 5mph. Starts up pretty good and idles fine, but as soon as it hits about 5mph (dont know the rpms) the motor starts violently surging. The weird thing about this is, it doesn't happen all the time. It normally will run just fine from the launch to my first spot, but once i decide to crank it up again, the surging normally starts. On the other hand, I can sometimes fix the surging by making it surge, then close throttle so engine almost stalls, open throttle and boom.
I've battled with this problem for quite some time now and I was just hoping someone out there new about these motors and these problems.
I've already cleaned carb and replaced every piece of fuel tubing,
Fuel pump works(Tried pumping bulb and didnt fix anything)
New plugs and wires
Both ignition coils test good
new thermostat
One concern i do have is about the charge coil (i guess stator) wires. When i got the motor there was a toggle switch connected to it just hanging there. Is that how it's supposed to be or not. thanks for any feedback
I've battled with this problem for quite some time now and I was just hoping someone out there new about these motors and these problems.
I've already cleaned carb and replaced every piece of fuel tubing,
Fuel pump works(Tried pumping bulb and didnt fix anything)
New plugs and wires
Both ignition coils test good
new thermostat
One concern i do have is about the charge coil (i guess stator) wires. When i got the motor there was a toggle switch connected to it just hanging there. Is that how it's supposed to be or not. thanks for any feedback