'54 Johnson 5.5hp CD10 powerhead gasket needed

[GSP2]

I'm new to the forum here and have found much useful information to get my new to me 1954 Johnson 5.5hp CD up and running well.Thanks for the information so far.

To ensure it lives a long life, I planned to replace the impeller, but in order to do so, the powerhead must come off. Does anyone have a source for the powerhead gasket for this motor? I've spent a couple hours looking on line and have found nothing. Contact info, part numbers...would be of great help and much appreciated.

 

[Chinewalker]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

I just ordered a pair of them from Napa last week. Pretty sure i-boats has them too. Sierra part number: 18-2894.

 

[shipwreck]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

You can use RTV silicone clean well , and apply, if it is the gasket between the motor head and and lower unit. It is low pressure seal , sometimes if gasket is good shape you can reuse, with a little gasket seal.

 

[GSP2]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

Thanks for the quick responses. I'll have to check the part number @ I-Boats the year range they had detailed did not go back to '54. I'll see if they have this part you provided.

 

[Chinewalker]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

I would not use RTV anywhere on an outboard. Too often I've pulled a big rubbery glob of that out of a cooling passage or carb jet of a blown motor...

 

[wbeaton]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

Most places only show parts back to 1956. Don't worry about it, though. All the consumable parts from 1954-55 are the same as 1956.

I agree with Chinewalker. Don't use RTV for the base gasket. The oil and gas in the exhaust water will make short work of it. Then you'll be looking for a replacement powerhead.

 

[shipwreck]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

It is choice , i am trying to find page for guy that rebuilds them has whole article and that is what use for gasket under the motor and on the exhaust port without know report problems.
The gasket are inexpensive and most times you can reuse org. one.

If need and parts for old outboards marineengine.com with have everything for all old outboards.

omc part
304314 5.15 marineengine.com


www.outboard-boat-motor-repair.com

 

[Kirkmn]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

looking for the gasket from the powerhead to the lower unit for a 56 fdel-10 15hp johnson. can't find the omc 303892 anywhere

 

[F_R]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

I normally don't reply to something tacked onto a year-old and unrelated thread, but what the hey---here goes.

303892 is obsolete. There was a problem with those motors and that thick gasket was replaced with two thin gaskets and a baffle plate. So, question is, does yours have that stainless steel baffle plate update?

If not, and you don't want to update it, then at least use two thin gaskets to get sufficient thickness. They are part number 304588. Any Evinrude dealer can get them for you.

 

[Kirkmn]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

my apologies, and thank you thank you F_R. what is the stainless steel baffleplate update?

 

[F_R]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

It is a plate intended to keep exhaust and hot water discharge from away from the lower crankshaft seal. It sort of worked, but didn't completely solve the problem in salt water.

 

[Kirkmn]

Re: '54 Johnson 5.5hp CD10 powerhead gasket needed

ahhh, I get it now. is there a part # for the baffle plate?