Also new to longtails. Bought a 20hp MBLT on a 1648 grizzly. Looks to me like previous owner greased the hell out of it or wondering if seals are shot. Prop is in decent shape. Last time out I had a lot of grease coming out of the top of the shaft and the prop started slinging some around too. Thoughts?

How many hours are on it? It shouldn't be slinging copious amounts of grease. As far as the prop is concerned , you should probably measure it. Props can look ok and have 1/2 an in missing, which can make all the difference in the world .

I don't know. But if grease is coming out by the spoon full, I would think your seals are gone.

Based on what I see, I would say yes, replace the seals. You probably need new seals on the bottom and possibly a new shaft. I just went through this with a used go devil 23 I bought. I was hesitant to do it myself, but after reading the owners manual and talking with the owner of go devil several times, I dove into it. I have a better understanding of how it all works and I am glad I did it.

First off, congrats! Secondly, being a "new to you" motor, I'd replace seals, bushings, bearing, shaft, and prop. That's a few extra hundred dollars that'll give you peace of mind knowing all the critical components are brand new and will last a good while.

Then run the fire out of it!

10-4 on what Frank said. The GD LT I had (both of them) oozed a lot of grease so I typically carried a grease gun. Not so with the MB roller bearing setup. I grease it a lot less. Parts are not that expensive and so it is worth the investment to replace these so you don't have a failure/breakdown. In the MB manual it clearly states the dangers of over-greasing the bearings. Happy mudding!

Thanks for the replies and suggestions. I'll have to give MB a call and get that ordered.