1965 9.5hp Johnson pops out of gear when driving

I have a 1965 9.5 Johnson Seahorse. It is the best running engine I have ever owned by far. I recently got it out of storage it had been sitting for 6+ years and it started on the 3rd pull. Johnson make the best small outboard.

The problem is the it pops out of gear and the engine revs up as soon as up give it gas. It does the same in foward and reverse. Up can hold pressure down on the gear shift lever to make it stay in gear and drive the boat but it requires two hands and is uncomfortable. While driving it and holding in gear the motor makes a loud bang about every 20-30 seconds (it is trying to pop out of gear) but doesn't since I am holding it in gear.

Hints to the problem before I tear it apart?

Also online can I order parts for a 1965 Johnson 9.5?

Re: 1965 9.5hp Johnson pops out of gear when driving

clutch dog and gears need to be replaces. try tcoutboard.com

Re: 1965 9.5hp Johnson pops out of gear when driving

Before you tear into the gearcase, drop the lower unit down enough to check the shift rod connector. When it is reconnected, the screw has to be completely removed or the beveled part of the rod will not reseat correctly.

Re: 1965 9.5hp Johnson pops out of gear when driving

Would anyone happen to know the part #'s for the clutch dog and gears for my 1965 Johnson 9.5?

Re: 1965 9.5hp Johnson pops out of gear when driving

Original 1965 OEM part numbers:
The dog is 377458;
The pinion is 307752;
Reverse is 307754;
Forward is 378170.