1957 5.5 evinrude fisherman

[keller346]

I have a 1957 5.5hp and the connector rod on cylinder 2(lower one) snapped. I can turn the flywheel to a point and the other piston goes up and down but cannot turn the flywheel all the way and have to turn it the opposite to make it go back. the other piston does not move at all. In one of the holes I seen what looks to be a piece of metal that was broke.

So what is the part number for a new rod and maybe even piston? Anyone have photos of how to replace this?

I just had the carb and everything under the flywheel replaced so is it even worth doing? It was running fine until then.

 

[bktheking]

Re: 1957 5.5 evinrude fisherman

You will need to take is apart to assess the damage, you may need a crank as well, you may have damaged the head, who knows. If that is the case they you may as well find another powerhead and be done with it.

 

[keller346]

Re: 1957 5.5 evinrude fisherman

ok i am taking it apart right now

 

[1946Zephyr]

Re: 1957 5.5 evinrude fisherman

Yea, it's hard telling what you got, untill it's apart. There have been times, I've been able to re-use cranks, but that is only if the connector is intact. Most of the time though, the crank will get hashed.sometimes too, the broken rod will knock a hole in the crank case, so you definately want to look at the crank case for any damage. If you're lucky enough to find a crank, they're over $300 and rods are another issue. You could research both options, by going to the AOMCI web site and see what all the members have for sale.

 

[keller346]

Re: 1957 5.5 evinrude fisherman

ok got it apart and it broke right at the piston. so it looks like just the rod needs replaced. There are no marks that I see on the crank.

 

[bktheking]

Re: 1957 5.5 evinrude fisherman

Sweet , then you got lucky! You may as well check it all over while it's a part. Check the pistons, replace the rings, check crank and conn rod bearings and surfaces, make sure you get a manual for torque specs. Check the condition of the cylinders, you will need to re hone the cylinders as well. Everything need to be marked and remembered for where it goes back together. Take pictures, make notes and plan ahead before you rebuild.

 

[R.Johnson]

Re: 1957 5.5 evinrude fisherman

I doubt if you can find the part's you need new. Those little bushed engine's did not like 50-1 oil mix.

 

[bktheking]

Re: 1957 5.5 evinrude fisherman

I pm'd you, there is a whole powerhead for sale on a site which would probably be cheaper than going the re and re route.

 

[stingertrey]

Re: 1957 5.5 evinrude fisherman

power head on ebay right now for $70 free shipping for a 5.5 jump on it and be done with it.. probably as much as a new rod and piston from a factory or shop...

 

[R.Johnson]

Re: 1957 5.5 evinrude fisherman

Is it all apart so you can see what your getting. I can send you a power head for the same money. You won't like it.

 

[bktheking]

Re: 1957 5.5 evinrude fisherman

Is buying a used powerhead for 70 bones a huge risk? I suspect the price of a gasket set would be half of the used powerhead, what is a ring set worth and a connecting rod? What about a used rod, it may break too in no time.

 

[R.Johnson]

Re: 1957 5.5 evinrude fisherman

What you need, has to work. My offer still stands.

 

[F_R]

Re: 1957 5.5 evinrude fisherman

It always gets blamed on the oil. The REAL problem in most cases is water getting up through the lower crank bearing because nobody wants to pay any attention to the carbon seal when replacing a water pump. The last four motors I tore down all had trashed seals and either tossed rods or about to toss a rod. Pulled another lower unit last night---trashed seal. I haven't looked into the power head yet.

However, due to the nature of the break in this case I wonder if somebody has ran it wide open in neutral? How many times have you read it--"it has plenty of revs in neutral but no power in gear"?

 

[1946Zephyr]

Re: 1957 5.5 evinrude fisherman

70 bucks for a complete powerhead is cheap. I would go for it
rebuild your original, at your leisure.