57 and 58 10hp sports twin differences?

[rfevans]

Ok guys I am new here and don't post much just read alot to figure my problems out and usually I manage. This started a week ago at my local outboard shop picking up parts for a late model 35 hp johnson. My local parts man took me to the back with him looking when I noticed in the corner a little old Evinrude that was clean as a pin so I inquired about it. He informed me that he got it on trade for some repair work on another outboard years back and the mechanic at the time took the carb off for a rebuild. Before he got it back together the mechanic quit and the carb is missing and so there it sat ever since and that was years ago as well. He asked me if I was interested that he would take a hundred bucks for it like it sat and I told I'ld think about it. I took down the model number and it ended up a 10016 that I believe makes it a 58 model after reading and seeing that I would have to convert it to a fuel pump or find a tank I dismissed it and thought no more about it till today thinking it was too much trouble. Today on craigslist there happen to be a 57 10hp evinrude for 75 bucks I could help it and called about it the guy said it was a runner with a bad lower unit with a good tank. So with that my wheels started spinning but I cant find any parts look ups for these to check to see whats inter changeable. I ended up reading here on another post that is when they changed lower units from 5 hole to 4. Here is the confusion with that is both these engines have 5 hole lower units and Im not sure what will interchange. I have not bought either one of these yet but will on the advice from you guys....Any thoughts suggestions or if Im plain stupid let me know all will be appreciated. Thanks in advance.

 

[kfa4303]

Re: 57 and 58 10hp sports twin differences?

Hi rfevans. Welcome to iboats. Those are two great little motors you're looking at. I had a '66 10 hp Johnson QD-22 (same motor) and it was great. Here's a link to a complete parts lists and exploded diagrams for both motor's Johnson equivalents. I'm not aware of any major changes between those years so the parts should be fairly interchangeable. Here are the parts links and a few others that should help. Good luck. Holler if you get stuck.

http://www.sschapterpsa.com/ramblings/johnson_QD.htm

http://forums.iboats.com/showthread.php?t=167352

http://www.duckworksmagazine.com/06/columns/max/index6.htm

http://www.marineengine.com/parts/v...ntage-evinrude-johnson/377020/37702000001.htm (Johnson equivalent of '57 e-rude)

http://www.marineengine.com/parts/v...ntage-evinrude-johnson/377513/37751300001.htm (Johnson equivalent of '58 e-rude)

 

[1946Zephyr]

Re: 57 and 58 10hp sports twin differences?

The '57 had the 5 bolt lower unit, that the 18's used and the '58 and newer had the smaller 4 bolt lower unit. The '57 was a lot better motor, eventhough it was a tad bit heavier.

 

[rfevans]

Re: 57 and 58 10hp sports twin differences?

Thanks for the effort in putting up those links thats a HUGE help...looks like the carbs are the same from just a first look. That was the one thing I had to know...I might as well just pull the trigger and give those old rudy's a shot..

 

[rfevans]

Re: 57 and 58 10hp sports twin differences?

Zephr what do you mean when you say the 57 is better than the 58? Is it possible that the 58 Ive located could be early in that production year because it has a 5 bolt lower unit I went back and checked thats where I got confused to start with. Im not very knowledgeable when it comes to these older outboards all tho Im learning quickly.Thanks for your input.

 

[1946Zephyr]

Re: 57 and 58 10hp sports twin differences?

The 5 bolt lower unit holds up a lot better than the later 4 bolt.. If they're both 5 bolt, then you're lucky. What are the model numbers on those motors?

 

[F_R]

Re: 57 and 58 10hp sports twin differences?

The original post said the '58 at the dealership is a 10016. That is correct, 10016 refers to 1958. However, something is wrong because 1958 had the four bolt lower unit. So it would appear that some monkey business has taken place with the number. Perhaps the stern bracket and data plate have been changed?

1958 Sportwin: http://www.old-omc.de/e_1958/seite_18.jpg

1957 Sportwin: http://www.old-omc.de/e_1957/seite_20_21.jpg

 

[rfevans]

Re: 57 and 58 10hp sports twin differences?

I will go and buy the 58 today or tomorrow and take some pics....it is in excellent condition and looked to have very little use. the 57 will take a little road trip to get its about 75 miles from me...From what I have found the carbs are the same can you guys confirm this before I purchase these...that would be the key to get one of them running regardless of 4 or 5 hole lower unit....Thanks again

 

[Chinewalker]

Re: 57 and 58 10hp sports twin differences?

The carbs should be close enough to get you going.

As for one year being "better" than the other, it's all a matter of opinion. Yes, the '57 has the heavier duty 5-bolt unit (as used on the 18), but the '58 is a lightweight performer. The lower units on the '58 & up are lighter duty, but do work well if you keep the oil in them and the water out, shift properly at lowest idle, and keep a good prop on them. Abuse them, and they do have a tendency to eat gears.