Montgomery Ward 1947 Sea King

montyward47

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I am helping my son restore a 1947 Sea King. The piston was seized in the cylinder head, which we soaked in diesel for several days and was able to push it out using a small press. The piston has some scrape marks on which I assume is the area which caused the seizure.

Would taking the piston & Cylinder head to an engine / machine shop be the way to go?

I have searched high and low for piston ring replacements and I found a reference number Re: Montgomery Wards Sea King (Gale) 74GG9006, #593425. Where might I find these? Or is there a cross reference to another workable set of rings?

We would be happy to put this old engine back into service.

Any insights / suggestions are greatly appreciated.

Montyward47
 

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brim_buster

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See if Johnson/Evinrude OMC has one. Gale OMC and Johnson Evinrude all the same company. Is it a 3hp
 
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brim_buster

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I looked at the parts list it was a model 1w4 made from 47-48
looks like..forgive my eyes are shot even with glasses.....Piston # 550186, Pin is # 550915 and ring is # 550314 and Im sure they could be cross referenced hopefully
 

montyward47

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brim_buster,
Where are you getting these part numbers from? Johnson parts list? Is Johnson Evinrude OMC a specific parts vendor?

Thanks,
Montyward47
 

F_R

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550314 is superseded by 593425 ring set of two. Call i-boats customer service, they may be available from their OEM partner. If not, there are plenty of them on e-bay
 

brim_buster

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brim_buster,
Where are you getting these part numbers from? Johnson parts list? Is Johnson Evinrude OMC a specific parts vendor?

Thanks,
Montyward47

I have a copy of the service manual and it has a break down of all the Gale made motors with original part numbers. Like FR said it looks like the ring # has changed
 

montyward47

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Thanks guys. I'm looking at the rings on ebay and none of them give tolerances. My ring set size looks to be about 2.0625 x .10. Do either of you know 593425 measurements. This has been a big help. Now I just have to find a machine shop that can do the machining of the head and truing the piston. Thanks Again!
 

F_R

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This is as far back as I have specs for
 

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montyward47

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.935 x 2.13 looks very very close to my numbers (my calipers are probably off - 70 years old) . I'm going with these numbers. Thanks FR
 
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