1971 1150 Reverse Gear/Clutch

[NJCinMN]

For the larger inlines are all 3 dog clutch and reverse gears interchangeable? I can't find any exact replacements (part #s) but all appear to use the same sliding clutch and straight toothed reverse gear. I found shift cam and cam follower. Gonna tackle this lower unit and get reverse back. Thanks.

 

[Chris1956]

Re: 1971 1150 Reverse Gear/Clutch

You should be able to check part numbers on the crowleymarine.com web site, for several models.

With the price of gears, you might look into a used lower unit.

What part of NJ are you from?

 

[NJCinMN]

Re: 1971 1150 Reverse Gear/Clutch

NJC are initials...actually in MN. Twin Cities area. Yeah I've been contemplating that and there are plenty of used ones around here. Plus swapping lower units would be a heck of a lot easier than redoing lower unit. I guess it would be a good learning experience though. Just don't want to buy one and have to do the same thing shortly. Also I have an extra lower unit from 1969 merc 1000 but reverse out as well (seems like a common issue). Any years better than others that'll bolt on?

 

[Chris1956]

Re: 1971 1150 Reverse Gear/Clutch

The later gearcases had the stainless steel driveshafts. I never heard that one was better than the other, however.

 

[NJCinMN]

Re: 1971 1150 Reverse Gear/Clutch

Thanks again Chris. I've decided to go with a complete gearcase. Up to what year will work?

 

[Chris1956]

Re: 1971 1150 Reverse Gear/Clutch

I would think that gearcases from 1970-1988, inline 4 and 6 cylinder gearcases will fit. The range is likely greater, but I am not sure of models other that those. some of the IL 4 cylinder gearcases have a 2.3::1 gear ratio. This will work, but you will need a prop with 2" more pitch to compensate.

Check out new gearcases from SEI. They might be just a bit more $ than used.