'66 40 hp skipping gear

[kazek]

Hi.motor is 40 hp Johnson electromatic.it started to slide in forward gear.it would kick in few times on low idle and engine would just REV when throttle is advanced.it helps when I shift to reverse and back to forward.how to fix this problem.thanx in advance

 

[F_R]

Re: '66 40 hp skipping gear

There are two possibilities:

1: A slipping propeller hub. Easy to check, make a mark on the prop nut and another on the propeller, aligned with the first one. Run motor till suspected slippage occurs, then stop and look at the marks. If no longer aligned, it slipped. Easy to cure, replace prop.

2: You don't want to hear this one. Could be a slipping clutch. That could be anything from a bad shift switch in the control, to bad wires all the way from switch to lower unit, to worn parts in the lower unit. A logical troubleshooting procedure is called for, starting with voltage checks and gear oil check.

 

[kazek]

Re: '66 40 hp skipping gear

Thanx for info.i did change oil already.old one did not have water or metal shavings.how can I check shift switch in control box.i had it open today and all semed ok.

 

[kazek]

Re: '66 40 hp skipping gear

One more question.... Are gears engaging with out motor running or it has to be running for the gear to kick in.when i put control lever in forward gear prop spins freely.