1963 Evinrude DuckTwin help

[1946Zephyr]

Re: 1963 Evinrude DuckTwin help

Running with the head bolts off?? Hmmmmm very interesting. I would say you likely have a lot of salt water corrosion obstructing the water passages, if this is the case. Where the powerhead bolts up, there are some small passages that would plug up very easy, from salt water corrosion.

 

[metal249]

Re: 1963 Evinrude DuckTwin help

Got the head off, it was completely full of corrosion. I'm cleaning it now, I will take off the power head tomorrow. I have to wait 8 days for the impeller and head gasket to come in. I'll let you know what I find when I pull the power head.

 

[metal249]

Re: 1963 Evinrude DuckTwin help

After cleaning the head with a brass brush and a toothbrush I have found a thin spot on the head. Any options here? Look at the closest side of the right cylinder.

 

[Chinewalker]

Re: 1963 Evinrude DuckTwin help

Ouch! I would probably replace the head - looks like it is almost through. Likely to blow the head gasket in short order.

Lacking that, a good welder might be able to put a small bead on there, enough to fill it back to original. Some time with a Dremel and then truing it up on a glass plate with a sheet of sandpaper can clean up a welded repair.

 

[nwcove]

Re: 1963 Evinrude DuckTwin help

ouch is right! id be looking for a new head! what does the cyl look like, where the bad spot on the head would mate to?

 

[metal249]

Re: 1963 Evinrude DuckTwin help

I cant find a new head, I'm going to take it to a machine shop and see what they say. This motor must be fairly low compression, the head gasket appears to be cardboard. If I cant get it fixed I'm going super redneck and using JB weld.

 

[Chinewalker]

Re: 1963 Evinrude DuckTwin help

Couldn't have looked too hard - there's one on eBay right now, item #260753848409

 

[metal249]

Re: 1963 Evinrude DuckTwin help

Thanks, I looked yesterday under lighttwin and ducktwin. Didn't know about yachttwin, Its looks the same. How many names do these things have?

 

[Chinewalker]

Re: 1963 Evinrude DuckTwin help

They're also the same head used on the Johnson versions, the JW & JH series...