1980 50 hp Johnson

[Johnson 50]

I am in the process of repairing and old motor that has pitting on the inner exhaust plate and the corrosion has left a small hole on the alum. casting/ power head - see photo look at the bottom left side and you can see the corroded edge of the casting
The question is whats the best patching compound to use ?

Aremco
JB weld
ITW supper allow Titanium
Marine tex

 

[tashasdaddy]

Re: 1980 50 hp Johnson

replacement.

 

[Johnson 50]

Re: 1980 50 hp Johnson

Hi thanks for the input Not sure if the motors parts are still available? That would mean the entire Cylinder/Block would need to be replaced correct

 

[kenmyfam]

Re: 1980 50 hp Johnson

You need to replace the "bad" castings. Only way to really be sure of a good repair to the motor. I don't really know of anyone that will attempt to repair a casting like that. I would certainly try it as an experiment as long as I had a replacement available when I screwed it up.

 

[Johnson 50]

Re: 1980 50 hp Johnson

Hey thanks, after some intense searching today I found this stuff called after I posted... check this out

HTS 2000 http://www.aluminumrepair.com/aluminum_repair.asp It claims to be made of several allows and you use it with heat ( propane torch) claims to have more strength than cast alum. $65 bucks for a pound vs. $565 for 10 lbs of the ITW super titanium allow and you have to buy a case of 12 cans they won't break a case....where could I locate a new/used casting?

j50

 

[kenmyfam]

Re: 1980 50 hp Johnson

We have tried to use that in the industrial environment that i work in. It certainly sounds great but we have only found it to be a "band aid" repair till we can get a replacement part ordered and in house or made.
I certainly would not use it on something that could leave me stranded in bad weather somewhere.

 

[Johnson 50]

Re: 1980 50 hp Johnson

Thanks very good input!

 

[kenmyfam]

Re: 1980 50 hp Johnson

Thanks very good input!

You are extremely welcome. My issue with that stuff is the melting point and durability of it when you put it back into service. Not something to think about 20 miles from shore with the paddles out !!!

 

[Johnson 50]

Re: 1980 50 hp Johnson

Morning,
My plan is to get it running to see if there are any other issues with the motor while I am trying to locate anew power head or a parts engine with a good power head This would be my winter project to rebuild it with a replacement. I was giving this contact as a potential place to find what I need:

Antique Outboard Motor Club Inc.
Dennis Evinrude
Box 69
Sussex, WI 53089
262-367-6875 fax 262-367-6875
evinrude@aomci.org
www.aomci.org <http://www.aomci.org/>

Do you know of any other resources ?
R

 

[tashasdaddy]

Re: 1980 50 hp Johnson

you can order new from here:
http://shop2.evinrude.com/ext/index.aspx?s1=bf6ad09c53cead335fcfd8a6471c0f7f

Product Details:

Part Number: 0320724 $25.00
Description: COVER INNER EXH

Part Number: 0315868 $8.48
Description: GASKET,IN EX CVR
Pack Qty: 1

Part Number: 0315869 $11.66
Description: GSKT, OUT EX CVR