6 hp lower unit interchangeability

[longrangedog]

I recently bought a really nice 1977 6 hp short shaft Johnson. It is in pristine condition with one exception: the previous owner drilled four 3/8" holes in the anti-cavitation plate. I see a 1978 lower unit for sale and would like to know if they are interchangeable. Is there an easier repair than changing lower units? Thanks for your help.

 

[joey maneri]

Re: 6 hp lower unit interchangeability

sounds like someone put a whale tail on the cav plate. the holes may not hurt anything. you could try to J B weld the holes, then sand down smooth if you want it to look good. On the other hand it might be nice to have a spare lower unit.

 

[sdshort]

Re: 6 hp lower unit interchangeability

If it were me I would find someone that can mig or tig weld those holes shut... should'nt cost much and would'nt take very long to weld.