P. Dave...

READ YOUR MANUAL under the "propeller" section. I still stand by the prop
hub slipping. I know that engine and prop up and
down, left and right, in and out. There IS a rubber hub between the bronze
hub (which is rotated/driven by the pin) and the aluminum prop. Just try
another prop and you will see the immediate difference. Forward, or
reverse, will NOT slip... it is a God-awful "chunking" sound and very
obvious.

The gears however, can be switched on this engine... the forward gear has a
bronze
bushing which must be pressed out and switched to the reverse gear (now
forward) first. They are otherwise identical, but the results are usually
less than satisfactory. The clutch dog can be used both ways on the shaft
too, but they are case hardened, and much more than a minor "dressing" will
cause a failure. The gears and dog are available in the aftermarket.

Rob
*
*
*
"Booms" wrote in message
news:Pnm8b.125$VS2.101@pd7tw1no...
"Joe Here" wrote in message
...
It could be that the "dogs" on the forward gear are worn, and
dis-engage under load. If it's not the prop (remember, there is much
less load on a prop in reverse than at WOT) I would buy a manual and
drop and split the lower unit and inspect all gears.

I have a manual that addresses Johnson engines from 1956 thru 70-something
and 1.5hp-40hp. I will have to give that a try. If only one side of the
dog is worn, is it possible to change the direction of the dog so that
reverse will slip, but forward will be ok?