um... gasket/no gasket

[reddaddy]

Hi guys, been reading this forum for a long time. I've been standing on the shoulders of your genius for some time. We'll start with the obvious; Evinrude/1976/model number 25603e. I'm installing a water pump kit. I have the parts catalog and Clymer service manual. OME manual is on the way. I got this thing apart, I don't know if it takes a gasket or not between number seventeen and number thirteen on the gear case section, that would be the housing and the plate. Originally it didn't have one when I took it apart, but it also didn't have a thermostat, some carburetor parts were missing, and the wrong plugs were installed. So while I figured the others out, this one's got me stumped. Any help would be appreciated, thanks guys.

 

[wilde1j]

Re: um... gasket/no gasket

Look at the parts list here: http://shop2.evinrude.com

 

[reddaddy]

Re: um... gasket/no gasket

thanks wilde1j but those sites are part of my problem . I have the parts list(1976 evinrude parts catalog). what i really need is someone who has this motor or experiance with it. Please don't get me wrong i deaply appriciate your time, but i have viewed these sites and searched the forum relentlesly.

 

[bob1340]

Re: um... gasket/no gasket

thanks wilde1j but those sites are part of my problem . I have the parts list(1976 evinrude parts catalog). what i really need is someone who has this motor or experiance with it. Please don't get me wrong i deaply appriciate your time, but i have viewed these sites and searched the forum relentlesly.

But look at the gear box picture and tell us which parts you are talking about.

http://shop2.evinrude.com/Index.aspx?s1=1da6faf4c25dc0772b809f9b361965e9&catalog_id=0&siteid=1


On the actual gear box "clam halves" there is no gasket, but a rubber rope deal which I have not been able to find anywhere.

If you are talking about the mating surface between the lower housing and the upper or extension piece , no gasket there.

 

[F_R]

Re: um... gasket/no gasket

Hi guys, been reading this forum for a long time. I've been standing on the shoulders of your genius for some time. We'll start with the obvious; Evinrude/1976/model number 25603e. I'm installing a water pump kit. I have the parts catalog and Clymer service manual. OME manual is on the way. I got this thing apart, I don't know if it takes a gasket or not between number seventeen and number thirteen on the gear case section, that would be the housing and the plate. Originally it didn't have one when I took it apart, but it also didn't have a thermostat, some carburetor parts were missing, and the wrong plugs were installed. So while I figured the others out, this one's got me stumped. Any help would be appreciated, thanks guys.

There is no gasket between the water pump plate and the gearcase, if that is what you are asking.

"Number 17 and number 13" don't mean anything unless we have the same parts list picture that you do.

 

[reddaddy]

Re: um... gasket/no gasket

Bob1340 I did look at the gear case and I gave numbers 13 and 17. And F R we do have the same parts list. My question is, why is everything else sealed except 13 the impeller housing and 17 the impeller housing plate? My concern is that I'll get this thing together and it will either leak water or something will intrude on the impeller. I have viewed many posts before asking these questions. I'm not trying to waste your time, I came prepared with all the information. But all the examples I've seen have a gasket or seal so this one is throwing me. Thanks guys.

 

[HighTrim]

Re: um... gasket/no gasket

I believe he is referring to the base of the impeller housing.

Is there no o ring in your water pump kit? There should be a groove around the perimeter of the housing that the o ring fits into, sealed with OMC Gasket Sealing Compound. Then there will be a gasket for under the impeller plate.

The original manual may call for sealant type M under the impeller housing plate, but alot of guys dont really use it, myself included.

 

[bob johnson]

Re: um... gasket/no gasket

I am not saying what is thge right way or the wrong way...but i will tell you exactly what went down on a series of events for me like you are going through.

I have a 95 115 johnson...it was giving me 10 PSI of water pressure at idle and would go all the way up to 30 PSI at WOT... seemingly pretty good


i went and bent the prop shaft...luckily I have a similar style motor with the same exact LU sitting by...so I figured Id drop the spare LU and put a water pump on it and rebuild the riginal in my liesure..

well I install a new water pump in the spare before i drop the old damaged one...so i can do it all in one day.

when i took that water pump off the spare it looked great, but since I was there I did the new install anyway...the plastic housing of the water pump looked fine before I took it off...there is an O-ring in the bottom of the plastic hosuing that rests on the metal plate you speak off..and then ther eis a gasket under the plate...

when In installed it all the housing left a large gap on one side and the screws couldnt pull it down flat to seal the O-ring against the metal plate!!

dangggg soo i gooped it all up with gasket sealant..and it looked ugly...

I installed the lu and I got the same water pressure reading i did with the nold unit..man i felt good...that my seal was work the effort...

UNTIL i looked at the damaged LU i just took off( which was giving great water pressure)...guess what?

It had the same huge gap where the housing wasnt sealing down onto the metal plate and the o-ring was doing nothing!!

and that motor was giving great pressure!!!

just facts as i discovered them...

yes id prefer to have everything seal flat and square and tite...but maybe it isnt the end of the world..

but boy would I looked bad recomending it as OK!! ha ha ha

dang plastic!! new housings too!!!!

so go ahead and use some sealant... if you like. or dont!!!

good luck


bob

 

[reddaddy]

Re: um... gasket/no gasket

Bob nice story, thanks. HighTrim the housing is cast no o ring, no groove. The kit came with 4 screws, impeller, #10 water tube grommet, and #16 impeller pin. This is a 1976 engine. No plastic housing, no internal housing cup. I did not receive any rope, o ring, or flat gaskets. Sorry to be so straight to the point , but here comes the lightning and i need my computer in one piece.

 

[F_R]

Re: um... gasket/no gasket

Bob1340 I did look at the gear case and I gave numbers 13 and 17. And F R we do have the same parts list. My question is, why is everything else sealed except 13 the impeller housing and 17 the impeller housing plate? My concern is that I'll get this thing together and it will either leak water or something will intrude on the impeller. I have viewed many posts before asking these questions. I'm not trying to waste your time, I came prepared with all the information. But all the examples I've seen have a gasket or seal so this one is throwing me. Thanks guys.

I don't know why you took offense at my reply. It was short and to the point. But with all the incorrect replies, I guess you have to test them for believeability.

Anyhow, I told you there is no gasket and there is no gasket. Period. Why?? Because that pump was used for over 20 years with no gasket. Never had one, never needed one.

But you SHOULD clean under the plate and use some sealer there. Most any gasket sealer will do.

 

[HighTrim]

Re: um... gasket/no gasket

Hmmm, you are right. I just checked out the parts list for that motor. I have had a few 1976 Rudes, a 55hp and a 200hp, and both water pumps had an o ring around the base of the impeller housing and a gasket underneath the impeller plate. My mistake, Im sorry, should have investigated further before replying.

Your OEM Service Manual will likely call for Sealant "M" under the impeller plate. Hard to find that stuff now. You can use Scotch Grip or 3M #847 (formerly Sealer 1000) or the like for metal to metal contact. May also call for OMC Gasket Sealing Compound on the housing screws. In your scenario I would probably seal it due to the lack of o ring and gasket.

....edit....Frank beat me to it....listen to him, he kinda knows what he's talking about

 

[reddaddy]

Re: um... gasket/no gasket

Thanks F R, didn't take offence. Guess I just don't have this netiquette down yet. I have read lots of postings from people like yourself, Hightrim, and Tashasdaddy. Normally you guys start with "welcome" and end with "glad we could help". Heck, I can even appreciate guys like bob who start with "don't know if I'm right or wrong but...". I kind of enjoy their stories. Sorry, I kind of look at this like a huge garage after hours; some guys almost live here and others just visit. You guys are the norm, I'm out of my element. But I really appreciate the help. Hightrim, I appreciate the sealant numbers and the help. Guys, have a great evening; thanks again.