evenrude water circulation problem

[knighthawks3girls]

i picked up a 1964 28hp evenrude speeditwin i got it up and running but i ran into a problem.the water is not circulating threw the waterpump so my lower unit is getting hot.i took the lower unit off and double checked the impeller(witch i just changed)and everything seems to be working properly.im all out of ideas because im not very noligable about outboards anyway. any ideas would be great.

 

[Cofe]

Re: evenrude water circulation problem

If you are running this motor in a barrel, the water level needs to be higher than the area on the leg where the water pump is located.

Welcome to iboats!

 

[knighthawks3girls]

Re: evenrude water circulation problem

im running it in a barrel and the water level is above.

 

[Cofe]

Re: evenrude water circulation problem

When you say the lower unit is getting hot. Are you running it in the barrel for more than 5 minutes? Are you heating the water up real hot by running the motor for a extended time in the barrel?

Is the motor overheating?

 

[knighthawks3girls]

Re: evenrude water circulation problem

the motor is not getting hot just the lower unit,i dont run it very long before it gets to hot but the water is still cold.im not sure how the lower units suppost to act(first time working on a boat motor)but when i start the motor in neutral there is alot of air movement in the barrel almost like its backwards and the intack is pushin air but i cant tell for sure.

 

[Cofe]

Re: evenrude water circulation problem

That's the way they are. Motor exhaust in the water, makes lots of turbulence. The important thing is the motor. If you cannot let your fingers stay on the head for a bit, then the motor is getting hot. The water pump cools the motor. The motor temperature should be about 145 degrees.

 

[knighthawks3girls]

Re: evenrude water circulation problem

like i said the motor is not getting hot but the lower unit gets to hot to touch and it starts to smoke out the pee hole if i let it run for a little bit

 

[Ruler2112]

Re: evenrude water circulation problem

Is there water coming out of the pee hole and is it hot?

 

[Cofe]

Re: evenrude water circulation problem

Something is definitely wrong with the water pump. You need to remove the lower unit and find out what is wrong.

 

[knighthawks3girls]

Re: evenrude water circulation problem

nothing

 

[knighthawks3girls]

Re: evenrude water circulation problem

i have tore it apart twice and i can see nothing wrong.is ther something specific i should be looking for?

 

[Ruler2112]

Re: evenrude water circulation problem

Something I almost did with mine is put it in backwards - easy to do because you have to cram it into the housing, bending the fins while you do so. If you bend them the wrong way, it won't work.


Could also be a blockage in the cooling system somewhere. I suck mud/sand into mine when going through certain specific areas (low water) and sometimes need to shove the end of a bottom-bouncer into the pee-hole to get it cleared. (Not very often though, thankfully.)

 

[knighthawks3girls]

Re: evenrude water circulation problem

before i took it apart the last time it was spraying fine.so i no the impeller is in correct and i cleaned out the pee hole there was nothing in it that would stop it from spraying(i ran the barrel low on water,thats why i took it apart to make sure i didnt mess anything up)

 

[DJ]

Re: evenrude water circulation problem

cleaned out the pee hole there was nothing in it that would stop it from spraying QUOTE]

How did you do that on an engine that never had one originally?

What part of the L/U is getting hot? Very lower? Mid section?

 

[knighthawks3girls]

Re: evenrude water circulation problem

the lower unit mid section is getting hot not the bottom.and im talking about the hole that sprays water when motor is running.i took off the lower unit cleaned out the copper tube and sprayed water backwards threw that hole untill the water came out clear(there were really tiny pieces of gunk)

 

[lindy46]

Re: evenrude water circulation problem

Are you sure you have the water tube inserted into the grommet on the water pump housing?

 

[knighthawks3girls]

Re: evenrude water circulation problem

yes i made sure when i put it together because someone else told me that might be the problem

 

[DJ]

Re: evenrude water circulation problem

the lower unit mid section is getting hot not the bottom.and im talking about the hole that sprays water when motor is running.i took off the lower unit cleaned out the copper tube and sprayed water backwards threw that hole untill the water came out clear(there were really tiny pieces of gunk)

Got it.

It does get hot. In essence, that is the muffler. If there is water spraying out of the exhaust relieff, it is getting water to cool it.

Is this something new that popped up or just something you just noticed?

 

[knighthawks3girls]

Re: evenrude water circulation problem

the exhaust relief is at the bottom of the unit by the prop right?this is a motor i just got it was tore apart when i got it i had to put it back together.if it is getting water to cool it why is the lower unit getting so hot you cant touch it and it starts to smoke

 

[DJ]

Re: evenrude water circulation problem

The hole that is half way up the mid section is an exhaust relief.

I think you need to run this engine in something other than a barrel to get rue results.

If the cylinder head is not getting hot, you're OK.

Glad you got it running. Congrat's.