Motor runs good out of water in water no go

Change lower unit lube, use fresh gas mixture with added Seafoam. Run as before, but longer. You can download manual from the web. Has P.M. instructions.

Could be a bad timer that will no longer rotate to the "off" dog.

Or a stuck relay in the closed position for the pump.
either replace the relay or the board if you don't have individual relays.
Naturally, check for proper operation of the relay 1st, before replacing arbitrarily. But you have a direction to go into now.

Try mounting it properly,cavitation plate 1/2 inch below bottom of boat.An old motor like that many things could cause a lack of power.

Hi Floyd
Please Send Serial No

The volume of water is less on the hose and water pressure in the lake is higher. You are also getting a different operating angle on the boat, because the transom is the low end of the boat.

The cuffs are just for testing and many of the new ones will indicate that you do not run the engine above idle with cuffs on.

Definitely it should push out water all the time. It probably looks like more with the hose pressure feeding the motor. You should have water discharge in the lake at idle.

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the inside of the prop has a rubber between the prop itself and the inside splines to act as a shock absorber,say if you were to hit a rock. that rubber had spun out and the splines are turning inside the prop. the prop is screwed. seen it 100 times before.