Water running out of gearcase/exhaust housing junction?

[WEH]

1972 Evinrude 9.5hp, Model 9222:<br /><br />Put my new (to me) motor in a garbage can full of water for it's first test run. Started on 5th or 6th pull, adjusted idle, runs great! (I think)<br /><br />But, a question: water spurts/sprays a heavy stream out of the water outlet, just like I would expect. Water is also comming out on both sides where the gearcase meets the exhaust housing. It's running a fair stream down both sides of the gearcase. Is this normal? I've never noticed that before on an outboard.<br /><br />Thanks,

 

[boatingfool]

Re: Water running out of gearcase/exhaust housing junction?

Is there water in the lower unit lube??

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

No, doesn't appear to be any water in the gearcase lube. It's clear/amber, not milky.<br /><br />?

 

[Walker]

Re: Water running out of gearcase/exhaust housing junction?

Its nothing to worry about. There are rubber boots that help seal the exhaust tube to the lower unit. You bootmay be mis-aligned, cracked or completely missing.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

The water coming out of the exhaust housing and running down on the outside of the gearcase is cold to the touch, not like the water spritzing out of the water outlet - which is warm to the touch.<br /><br />I was concerned about the seal in the top of the water pump, or the water pump leaking somehow.<br /><br />Not a problem?????

 

[boatingfool]

Re: Water running out of gearcase/exhaust housing junction?

You said in your fist post you were gunning it in a garbage can of water.<br />When did you see the water leaking out?? After you pulled it out of the can??

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

crappiecruncher,The horizontal joint between the gear housing and exhaust housing is not a hermetic seal.It should contain leakoff port/ports where the joint mates to accomodate drainage when engine is stopped.I you feel there is excessive leakoff from the joint while running motor, the discharge tube may be leaking,discharging excess water volume into housing cavity in which case the unit would need to be dropped to remedy.If sufficient water flow is reaching engine jackets to provide cooling and engine does not seem to be overheating ,there may be no need for concern.Water in container while flushing should be 2" to 3" above the horizontal joint between lower unit and exhaust housing.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

I had the water in the garbage can an inch or two below the junction of the exhaust housing and the gearcase, so that the junction was exposed while running in the can of water. The water is running out from beneath the exhaust housing which, being visible above the water, allows water to be seen as it comes from beneath the exhaust houseing falling over the lower gearcase when the motor is running.<br /><br />If it were water being expelled with the exhaust, having been used to cool the power head, wouldn't it be warm like the water spritzing from the water outlet?<br /><br />How would I know if the engine was getting too hot? That is, if insufficient water were being circulated to sufficiently cool the engine?<br /><br />Looking at the diagrams in the service manual and the parts catalog, I can't see where the water could be coming from except somehow being expelled (leaking) from the water pump. Am I making this more difficult than it is?<br /><br />Thanks everyone for your help,

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

crappie cruncher,Did you note whether the water was being expelled from joint through drainoff ports?If the discharge tube were leaking,and excess water was discharging into cavity ,the water leaking out would not be warm to touch as it has not run through engine jackets.You can determine whether engine temp is excessive by touching several locations around powerhead and head cover while engine is running and warmed up either by feel check or using a thermo melt stick of 163 degrees.These stiks are available through a reputable dealer or auto supply house.If touch checking you should be able to leave hand on block or head cover for several seconds before needing to remove preventing burn.Be careful around rotating parts while motor is running.<br />Bare in mind that running in test tank not under full load is not an accurate indication of how high motor temp may attain while driving a load.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

I don't understand "drainoff ports". Could you please explain this in a little more detail?<br /><br />Right now I'm venturing a guess that it's not overheating. I bought the motor from an OMC dealer of twenty-something years. He specifically checked the temperature @ cyl's, 140 degrees.

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

Follow the edge of the joint toward front of motor.There should be a a notch of at least 1/8" that leads into cavity for drainage.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

Sounds like we're not talking about the same motor.<br /><br />My '72 9.5, when I look up into the exhaust housing from below, is open all around into the 'cavity' of the exhaust housing, obstructed only by four RUBBER MOUNTs - front & rear, port and starboard. I can look up inside the exhaust housing easily and even stick my fingers up inside it.<br /><br />Further close inspection has led me to believe that the water may be coming from the port and starboard RUBBER MOUNTs, Ref 92 in the parts catalog, part 309698. The water is running down the outside of the gearcase just below and slightly in front of these RUBBER MOUNTs.<br /><br />Also, the cavity up inside the exhaust housing is uniformly dirty. I can wipe it off with a light touch from my finger so if water were coming out above these RUBBER MOUNTs I think the dirt would be washed off.<br /><br />Do the "nests" that the port and starboard RUBBER MOUNTs rest in have penetrations that go into the exhaust chanber?

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

Any more thoughts on this?<br /><br />Thanks,

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

crappie,Don't know how your exhauast housing is set up but my 70 hp evinrude has two relief holes behind and to the front of the rubber mount dampers that leak off water when running.These holes lead straight into the exhaust housing cavity.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

I don't see any relief holes anywhere but they may be there, out of sight. I do see two screw holes, at least they are threaded holes on either side of the lower front rubber mount, Ref. No. 93 in the parts catalog. They are threaded but there is nothing in them - I wonder if they are relief holes?<br /><br />Relief hole - Is this to provide vaccuum relief so water isn't sucked up inside the exhaust cavity when the motor is shut off? It makes sense that there would be some sort of relief.

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

crappie,I'm not real clear on why the ones on my motor are where they are at.Best I can summise is that they either provide a means of distributing waterflow around exhaust tube or serve as a vent for the cavity drain notch on the horizontal joint of the lower unit.These two holes on mine are only slightly visible when looking down at mount dampers and were brought to my attention after I observed similar leak off as you describe.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

Okay. Unless anyone else has anything relevant I think I am getting concerned about nothing. I don't know why, but I'm inclined to agree - it's apparently normal for water to run out from beneath the exhaust housing and run down on the lower gearcase.<br /><br />Thanks for all your interest and help, ob, it is much appreciated.

 

[ob]

Re: Water running out of gearcase/exhaust housing junction?

crappie cruncher,Did a little research.The holes in my exhaust housing are used as overflow ports for the exhaust cavity.It prevents excess water from filling any deeper up the exhaust housing leg.I first noticed my leakoff after changing out waterpump assy.Guess new one was moving a bit more water than the old one.

 

[WEH]

Re: Water running out of gearcase/exhaust housing junction?

That makes sense. The dealer I bought the motor from put a new impeller in. Sounds like the same situation.<br /><br />Thanks again,