How to disconnect lower unit from motor on 1957 5.5 Johnson to change impellor

[robiek]

Could anyone please tell me how to disconnect the lower unit from the motor/gear shifter on a 1957 Johnson 5.5 CD-14 so the impellor can be changed? Any help would be much appreiciated:

 

[Sea18Horse]

Re: How to disconnect lower unit from motor on 1957 5.5 Johnson to change impellor

On those you need to remove the powerhead to disconnect the shift linkage. A pain but it's not as bad as it sounds. You will need a new powerhead gasket and you need to be careful with the lower seal since it sits basically on top of the drive shaft. The proper oem service manual for that engine would be invaluable.

Cheers...................Todd

 

[robiek]

Re: How to disconnect lower unit from motor on 1957 5.5 Johnson to change impellor

You mean all those little flat headed screws underneath need to come out? Oh, boy :O

 

[F_R]

Re: How to disconnect lower unit from motor on 1957 5.5 Johnson to change impellor

1. Disconnect fuel & air hoses.
2. Remove the vertical throttle control shaft (not necessary, but it makes reassembly easier)
3. Remove the 7 screws holding the powerhead on. Note location of the slightly longer ones.
4. Lift powerhead off.
5. Two nuts with a lockwasher between them hold the shift rod.

When you put it back together, use a new powerhead gasket and a NEW 303355 gasket and 303347 o-ring on the carbon seal assembly. That seal assembly is a vital part and must not leak.