Prop spins but doesn't push boat

[flakeys2005]

8 hp Nissan 2 stroke
I took my wife and two kids on a dinghy ride today and while going up river it felt as if the prop was cavitating so I throttled down and let the dinghy come to rest. When I throttled up again the prop was spinning but we weren't moving like we should have been. The motor was at full throttle but we were moving at little more than idle speed. I got back to the dock and took the prop off hoping to find a shear pin. There is no shear pin on the prop shaft so I took the prop shaft out and everything looked ok. I put the shaft back in, put the motor back on the boat and tried it out. Now it not only doesn't work as it should but I don't have a neutral. I can start it in the neutral position but I go. Also can't shift into reverse. What do I need to do to fix this problem? Thanks.

 

[Packard8]

Re: Prop spins but doesn't push boat

Sounds like a spun hub on the prop. If so, you'll need to replace the prop. When removing and replacing the shaft, the shift rod may have gotten out of position.

 

[flakeys2005]

Re: Prop spins but doesn't push boat

Sounds like a spun hub on the prop. If so, you'll need to replace the prop. When removing and replacing the shaft, the shift rod may have gotten out of position.

I will check the hub out tomorrow. Does the shift rod fit into a certain place in the gears on the shaft?

 

[Packard8]

Re: Prop spins but doesn't push boat

I will check the hub out tomorrow. Does the shift rod fit into a certain place in the gears on the shaft?

I don't have any hands on experience with your model, but with most outboards you need to confirm that the shift lever and the gear box are on the same page (in the same gear position, neutral) during reassembly.

Hopefully one of the knowledgeable Tohatsu Techs here will post an answer. Also if you post a complete model and serial number you will get a more accurate response as there were sometimes running changes within a model series.

Good luck!

 

[Sea Rider]

Re: Prop spins but doesn't push boat

A wrong way to check a prop, now you have a new main bummer : resetting gear box to work as factory deliverd, once you solve this tech issue and before investing on a new prop, perform a hub slip test, the only accurate way to know if with hub issues.

Happy Boating

 

[pvanv]

Re: Prop spins but doesn't push boat

There was no need to pull the prop shaft. You need to replace the prop, as the hub has spun. In addition, you probably dropped the spring retainer while you had the prop shaft housing out. It's supposed to be between the spring and the push rod, riding on the roll pin of the clutch dog. If it's washing around inside the housing, it may jam between the bears, and cause massive damage. If it fell to the ground, all you need to do is put it back into the LU. It pays to have the Factory service manual when working on such things.