58 Four Fifty Evinrude "Dump Hose"

[W_Guy]

OK, here's a new thread about an issue I've posted about before.

Every time I read a post about this motor there were numerous comments about what gas hogs these motors were/are. A few people have stated that part of the problem was a dump hose from the bottom of the intake manifold into the exhaust.

I bought this motor this way. (NO dump hose). I ran it on a lake and there was NO OIL SLICK anywhere. Idled a long time too. The issue is that I DO NOT have a problem with the motor, but I'm very curious why I don't have one (based on other persons comments) It seems that it's been modified and I'd like to know more about the possible modifications. If we can figure it out, it just might help other people with a motor like this one.
So here's the photo of it again for your review. I've also heard from one knowledgable person that there shouldn't be a dump hose on it, so I'm even more confused.
I hope we can figure this out.

 

[F_R]

Re: 58 Four Fifty Evinrude "Dump Hose"

Did you see the picture I posted on the other thread?

I cannot believe your motor doesn't have crankcase drain valves. But I can't prove that without tearing it apart. If it doesn't have a hose, it must have internal drain passages. But I can't prove that without tearing it apart either.

There is something here that neither one of us is seeing.

EDIT: Ok, I'll give an inch on this one. I hunted up a parts list for the 1958 and it does appear that there was no hose that year. That was the 1959 that I posted and the hose continued to be used for about ten years.

BUT the 1958 DOES have drain valves. I just don't know how they are routed. Must be internal passages. This is 1958 drain valves:

 

[W_Guy]

Re: 58 Four Fifty Evinrude "Dump Hose"

Well, that's a new piece of info. Thanks! I just wonder why I don't see an oil slick? Honestly, not a trace. No smoke either.

Here's the other side of the manifold.

 

[1946Zephyr]

Re: 58 Four Fifty Evinrude "Dump Hose"

No smoke? Uh oh....did you mix oil in the gas? Aren't these supposed to be mixed at 24:1? If it is, it should smoke like a banchee.

 

[W_Guy]

Re: 58 Four Fifty Evinrude "Dump Hose"

I used 32:1 which was a recommendation from someone here.

 

[Chris1956]

Re: 58 Four Fifty Evinrude "Dump Hose"

FR - My '58 Johnson Fatty did have a drain hose. I do not remember if my '59 Johnson Fatty did, however.


W-Guy, OMC called for all motors made before 1964 to use a 24::1 gas oil mix. However, the Fat fifty was a new design. I would PM Joe Reeves for his opinion, and if he says 50::1, I would use it. He has lots of experience working on those Fattys, as well as other OMC Products from the 50s and 60s.

 

[Joe Reeves]

Re: 58 Four Fifty Evinrude "Dump Hose"

You can safely use the 50/1 mixture on that engine as all moving parts are bearing equipped.

The dump hose thing...... I had a mental picture that you were actually speaking of a hose dumping directly from the carb or intake manifold.

The early 75hp models from 1960 up to approximately all of the V4 1968 models did incorporate a "Cylinder to Crankcase" drain hose on the bottom starboard side of the crankcase (The 1958/59 V4 models did not incorporate this to my knowledge).

Whatever internal setup the older 50hp models might have had escapes me. However, due to it being the very first V4 outboard model in existence, it may have very well been neglected.

 

[W_Guy]

Re: 58 Four Fifty Evinrude "Dump Hose"

Well, 1st hand accounts say my '58 "should" have the drain hose to the exhaust. SO, the mystery remains.........mine doesn't have one. Was it modified? Was it a late production change? The diagram posted on the other thread (the one I invaded) is from a '59, so that would seem to indicate that all of '58 would have had one. The photo of my motor shows a fitting at the bottom of the intake manifold but nothing connected to it. I'm thinking "modification", but I'm just learning about these motors so I'm hoping the more experienced members here can help solve the puzzle.

As to the oil mix, maybe Evinrude's initial recommendation of 24:1 was just to "be safe", not knowing how incredibly reliable those new roller/ball bearing motors would actually be! I'm VERY happy with the way mine runs!
Verne

 

[Joe Reeves]

Re: 58 Four Fifty Evinrude "Dump Hose"

I think I need to go over to a local dealership to refresh my memory. So far, I came up with the following.

 

[W_Guy]

Re: 58 Four Fifty Evinrude "Dump Hose"

Thanks for posting those Joe. My motor seems to have the nipple that's shown on the '59 cut-away but nothing's connected to it. Mine is model 50012-01251.
Here's an interesting tidbit from the '58 advertising catalog.

 

[Joe Reeves]

Re: 58 Four Fifty Evinrude "Dump Hose"

And the 50012 model is definitely a 1958 50hp model.