1954 johnson 10 hp seahorse wont go into gear but runs

[schap7]

My 1954 johnson seahorse 10 hp was running great until the other day im on the lake cruising at a medium speed and the engine suddenly went into nuetral and revved all the way up . i stopped tried to put it in reverse, wont go in reverse . tried to put back in forward and wont move its like it is stuck in nuetral

[BonairII]

Prob broken clutch dog and/or bad shift linkage

[Daviet]

Might start by checking the drive (shear) pin.

[kfa4303]

Hi schap7. There are 2-3 things it could be. They're all pretty easy to check. First would be to see if you have a broken shear pin. You can check by removing the prop. If a broken brass pin comes out, then there's your problem. That means it did its job and broke rather than engine. However, usually that occurs when you hit something which causes the pin to shear. If that's not it, then drawn scribe a line on the backside of the prop, then run it again until it slips. Remove the prop and see if the scribe is still aligned. If not, then you have a spun hub in your prop. No worries, it's very common and again designed to fail should you hit something. You can get it rehubbed for about $40-$50 at a prop shop, or you might be able to find one on a donor motor some where. If the hub is not spun, then I think it may be your clutch dog. It's housed in your gear case. It's not hard to fix, but you do have to open up the gear case to get at it. Try these simple tests and let us know what you find and we'll take it from there. Good luck. Keep us posted.

[schap7]

thanks a lot for all your help and quick responses everyone i am a rookie to boating and i greatly aprreicate your help. It turns out it was only the shear pin thank god its not another 100 dollar repair.!

[kfa4303]

sweet!

[schap7]

Hey I have one more quick question . I drained the lube from the lower casing near the prop. What is the proper lube to put in I picked up 80w90 high viscosity lower unit gear lube is this correct?

[Daviet]

Yep, that's what you need, fill from the drain untill it comes out the vent. Make sure to use new seals on the screws.

[schap7]

Does anyone know where I can find any parts for this model such as drain plug screws and seals and the actual shear pins instead of modified brass screws?

[AlTn]

marineengine.com goes back to 1955...don't know if there's any difference between the 2 years