Newbie help with older motor: Tohatsu M25B 25hp

[boat-r]

Hello all, new to this forum. Am hopeful that you will be able to help me out and share knowledge.

Got this motor back in '85. recently got a new boat after letting it sit for 15 years in garage. Installed on new boat and it still runs great. after several outings, I found oil leaking from the prop; presumably the prop shaft seal.

I have discovered getting parts may be a challenge. The shear pins are no longer available from Tohatsu, got one on ebay though

I got the service manual, and have questions for those experienced with this type of model. Have read the service/ shop manual - have questions before attempting repair. not sure if aftermarket service manuals are available for this model.

>>> Q: it appears that after removing the prop shaft mounting bolts, the whole prop shaft comes out? the manual is confusing: do other rods etc need to be detached? want to replace prop shaft seal, and want to know if i am getting in over my head. any help, hints, instructions, etc?

help! thanks...

 

[Sea Rider]

Welcome to Iboats,

Before removing prop housing need to determine if oil coming from prop is unburned combustion fuel/oil leftovers or it's gear case oil. If clear it's gear oil, if dark, stinky and gummy it's leftovers, which is normal in 2 strokes OB's.

Anyway drain old oil in a pan and check oil cond. If milky need a new lower leg seal kit. If ok, just add new 90-80/90 grade high quality gear oil.

Probably parts from a Tohatsu M25C2 will fit ?

Happy Boating