1965 90hp not spraying water

[waldreps]

I have a 1965 90hp Evinrude that I purchased last year but have never had it running till last night. I put the boat in the lake and started the motor. It ran smooth but no water was spraying from the exhaust hole at the back of the engine. I never got above idle, stayed in neutral, never left the dock and only allowed the engine to run for a minute or two. Is water supposed to be squirting out of that hole even at idle? Does this mean that the water pump is trashed? Anything I should check before getting water pump parts and taking things apart? What parts should I get to replace? Thanks for any help.

 

[oldcatamount]

Re: 1965 90hp not spraying water

Yes, there should be a spray coming out of the exhaust housing even at idle. I would say the impeller is shot and (if it were me) I would order a water pump repair kit for it. That way you get all the parts you need for the replacement.

 

[Chris1956]

Re: 1965 90hp not spraying water

Well, the water will only spit (more descriptive than spray) out after the thermostat has opened. It may take a couple of minutes for the thermostat to open. The water will be about 140*F after the 'stat opens. I would pull the cover and run her until she starts spitting and then take it's temp with a meat thermometer. Keep a hand on the block to detect overheat.

 

[waldreps]

Re: 1965 90hp not spraying water

Thanks for the responses. So, I maybe should have just let the engine run a few minutes longer to see if it started spitting water? I would hate to ruin the engine by letting it run too long without water going through. Is there anyway to test the water pump without running the engine? How hard is it to take the thermostat out and try it? I'm assuming that would let the water flow immediately, right?

 

[F_R]

Re: 1965 90hp not spraying water

I disagree. There should be SOME water spray any time it is running regardless of thermostat position. That is necessary to cool the exhaust housing. The AMOUNT of spray does vary with thermostat position.

 

[nwcove]

Re: 1965 90hp not spraying water

if you dont know when the impeller was last replaced.......its overdue anyway. get the parts and replace it. jmo

 

[waldreps]

Re: 1965 90hp not spraying water

Ok, so even when I first started the motor, some water should have been coming out? Water was getting agitated around pretty good down lower but nothing was coming out of the exhaust hole thing on the back. I don't want to put a lot of money in this motor since I have no idea if it really works right or not. Would you think a water pump repair kit would be everything I need? Do I need any other gaskets or seals? I don't have to get into the gears and transmission to do this, do I? Thanks for all the help.

 

[boobie]

Re: 1965 90hp not spraying water

No. Just get the water pump kit.

 

[waldreps]

Re: 1965 90hp not spraying water

Do I need to drain the lower unit oil to put in the water pump repair kit? I just drained and filled it before I test the motor. Just wondering. Thanks.

 

[Chris1956]

Re: 1965 90hp not spraying water

No, you do not need to drain the gearcase to replace the waterpump. You do need to remove the gearcase from the midsection. Don't forget to disconnect the shift linkage. Is it electric or mechanical?

 

[F_R]

Re: 1965 90hp not spraying water

It would be electric. You do have to disconnect the electric able or you will yank it in two. Then you will find out it is no longer available and $$$$ if you do find one.

The disconnects are at the rear, by the thermostat housing. Then remove the inspection cover from the side of the midsection. Then fish the wire out through the opening you just made. Now remove the screws from the plate inside the opening and pull that second plate off the wires. Tie a string on the wires to aid in reassembly. NOW you can safely remove the lower unit.

 

[waldreps]

Re: 1965 90hp not spraying water

Thanks for the tips. If you have anymore tips or suggestions, please share.

 

[waldreps]

Re: 1965 90hp not spraying water

I don't have any disconnects for the shift wires. Looks like I'm going to have to cut them and splice them back together. They run right up from down below and go right into the wiring harness along with the other wires, unless I'm missing something. Is there any problem with cutting and splicing them?

 

[F_R]

Re: 1965 90hp not spraying water

They are SUPPOSED to have disconnects. Has somebody already spliced them? The factory never made them without disconnects. The disconnects are covered with a couple of rubber sleeves that you slide back to reveal the knife terminals. A squirt of WD-40 helps loosen them for easy sliding.

 

[waldreps]

Re: 1965 90hp not spraying water

Ok....I see one of them has a rubber sleeve almost 2" long and the other one has electrical tape there. That must be the disconnects. The rubber sleeve seems really tight. I'll try the WD-40. Thanks.

 

[waldreps]

Re: 1965 90hp not spraying water

I got the lower unit off. One of the knife terminals broke off of the shift wire as I was unhooking them. Where do I get one of those? I've never seen knife terminals before. I took the water pump apart and didn't see any obvious problems with the impeller or the housing. I'm not convinced that I even needed to pull it apart. I'm not sure why else it wouldn't be squirting water though. How much up and down play should there be in the drive shaft or does that even matter? I guess I'm going to go ahead and order a water pump repair kit even though I don't really see anything wrong with any of it. Do I need a gasket between the lower unit and the extension housing? There was one there when I took it apart. Can I just use a tube of gasket maker?

 

[waldreps]

Re: 1965 90hp not spraying water

Anybody?

 

[Chris1956]

Re: 1965 90hp not spraying water

OMC made lots of electric shift motors. Maybe an older dealer has one? if not see what you can get at an electrical supply house. Cromeplated copper or brass would likely work. You will want lots of surface area to make a good contact.

 

[waldreps]

Re: 1965 90hp not spraying water

Thanks, Chris. Any ideas on the gasket question or the up and down drive shaft play?

 

[Chris1956]

Re: 1965 90hp not spraying water

I cannot answer the up/down play in the driveshaft. Joe Reeves will know. On my old Johnny V4 we used to put some permetex #2 on the gearcase/midsection joint. No gasket was specified.