1960 40 hp johnson rds22

[cluke3]

anyone know what year powerheads will work with this model . i bought a 40 hp powerhead owner said it was 1964 but no numbers on the welch plug by the thermostat like my old one. are thay somwhere else this one has a plug with a hump but no numbers.

 

[CATransplant]

Re: 1960 40 hp johnson rds22

Any of the 40 hp powerheads from 1960-69, plus the RDS-20 and RDS-21 35 hp powerheads from 1958 and 1959.<br /><br />There may be some others, as well. I think the 33hp powerheads will work as well.<br /><br />If the welch plug has been replaced, it won't have a number.

 

[lark2004]

Re: 1960 40 hp johnson rds22

try for the later models if you can, Needle bearings were used in the engines from 64 onwards. with these, you can reduce your oil to 50:1

 

[R.Johnson]

Re: 1960 40 hp johnson rds22

The Big-Twin engine was entirely needle bearing in 1957. They always were except for the wrist pin.

 

[cluke3]

Re: 1960 40 hp johnson rds22

so a 1969 mounting gasket will work

 

[cluke3]

Re: 1960 40 hp johnson rds22

will a 1969 mounting gasket work and should i stay at 24-1

 

[CATransplant]

Re: 1960 40 hp johnson rds22

You can use 50:1 in that 64 powerhead. Myself, I'd go with 32:1, but that's just me.