EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

[edd_barker]

Hi all,

Fired up my 1962 Evinrude Sportwin this afternoon after a LU/ignition/carb rebuild. Started up great and sounds really smooth, but the first thing i noticed was TWO streams of water coming from these holes:




They are not drain-holes from the exhaust casing, they lead to the seperate section of the housing that the drive-shaft goes up (inside its own tube). Are these twin pee-holes from the cooling system? I did clean a hell of a lot of crap out the thermostat housing and replace the thermo, but water DID NOT come out of these holes prior to the rebuild, only a spray out of the exhaust here:



If water is not supposed to come out of here then I have a serious water problem somewhere. I am hoping that I've just got away with running the motor without cooling for two years, or maybe a thermostat stuck open?

Looking forward to a response so I can get back out there and tune the carb.

Thanks in advance guys!

Edd

 

[kfa4303]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

Hi edd. The exhaust port is shown in your second pic. You will not get a "pee stream" like modern motors. Instead you'll get a mix of exhaust gas and cooling water in sort of a spray/mist about the temperature of a warm cup of tea. Make sure you only ever run the motor on the water, or in a test tank with water filled up to about an inch below the main exhaust port as motors of this vintage do not have self priming water pumps and cannot be run using muffs. The first pic is the shift rod coupler access panel. You remove it to gain access to the coupler behind.You most often use it when dropping the lower end to change the impeller. By removing the lower bolt of the coupler the lower shift rod is able to be disconnected allowing ht LU to be removed for servicing. Here's a great link on rebuilding a carb. It's for a slightly different model, but the basic steps are the same.

http://www.outboard-boat-motor-repa...hnson 5.5 HP 1954-1964 Carburetor Tune-UP.htm

 

[BobnTed]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

On that engine those two first photos show cooling water exiting, its normal, the second is exhust and water exit.

 

[kfa4303]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

oh yeah, I missed those little guys. water usually just sort of dribbled out of them on my old '61 10 hp Johnson.

 

[edd_barker]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

Hi guys,

Thanks for replies, yes sorry if picture wasn't clear, I was referring to the tiny hole in the first two pictures, there is one either side of the motor, not just in the side with the shift rod access. I have water flowing substantially and evenly out of both holes, almost like a jet. It definitely did not do that before, and is cold water. I do have a spray of warm water from he exhaust which I did before the rebuild, it's just these two holes which definitely did not have water coming out before.

I just wanted to make sure I don't have a leak somewhere?

Thanks, edd

 

[edd_barker]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

Hi guys,

Thanks for replies, yes sorry if picture wasn't clear, I was referring to the tiny hole in the first two pictures, there is one either side of the motor, not just in the side with the shift rod access. I have water flowing substantially and evenly out of both holes, almost like a jet. It definitely did not do that before, and is cold water. I do have a spray of warm water from he exhaust which I did before the rebuild, it's just these two holes which definitely did not have water coming out before.

I just wanted to make sure I don't have a leak somewhere?

Thanks, edd

 

[kfa4303]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

You're good to go edd. The two, smaller, lower holes are just drains for excess water for the impeller. The fact that the streams of water are nice and strong now means all is well. That water never gets sent to the power head to be warmed, whereas the water coming out of the main exhaust port has been sent of the copper water uptake tube and been cycled through the power head and warmed, hence the difference in water temp. Now let's see that little fire-breather on the water!

 

[F_R]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

Those two holes are to drain off the water that escapes the water pump around the drive shaft opening. It is normal for some water to escape, in fact it is intentional to provide a water seal so the pump doesn't suck air. A pretty serious stream is normal, but a severely worn pump housing or impeller will increae the leakage/flow.

If the holes did NOT drain, the water would fill the drive shaft tube clear up and come out the vent hole at the top. It would also get to the lower crankshaft seal and cause damage there.

 

[edd_barker]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

Hi guys,

Thanks for the positive replies, glad to know that something is not seriously wrong. My entire water pump including upper/lower housings is brand new, so I am assuming that the flow is not excessive because of that. Water is not jetting out but it is a very healthy flow.

So is there a hole in the upper housing that allows excess water out? I'm just trying to understand exactly where it comes from, the drive shaft tube is sealed with an O-ring where it slots into the upper water pump housing, and then an O-ring where that tube enters the powerhead, protecting the drive shaft from water. I understand what F_R means about the water flowing up that tube if there wasn't any drainage, which I guess it was doing before and that does explain the serious pitting on my drive shaft. I just can't picture what is going on in the water pump to produce that extra water, I can't figure out where it could go apart from up the copper pipe to the head?

If anyone has time to explain that'd be much appreciated.

Many thanks again!

Edd

 

[kfa4303]

Re: EVINRUDE 1962 SPORTWIN - Do I have two pee-holes? (Not a joke!)

yeah it's a little confusing. As the motor spins it of course turns the drive shaft and therefore the impeller. At neutral, idle, or while in the tank water is sucked in through the little slotted panel just above the anti-vent plate. Some of it is sent out of the top of the water pump housing into the copper tube and then up to the power head where it runs through a series of passages to draw off heat from the motor before ultimately getting expelled along with the exhaust gasses via the main exhaust port in the leg as well as beneath the water. When you're at cruising speeds on the water, the prop also forces water up through the small screened opening in the leg, which then directs the water onto the water pump. At the same time, some water is allowed to escape through the top of the water pump housing to keep it covered with water so as to help prevent the impeller from sucking air. That water then drains out of the two little holes in the first pic. The faster the motor spins, the more water it pumps and more water is sent to the motor via the copper tube and out the top of the housing and on to the drain holes.