all i want for christmas is my motor to work.

[bktheking]

Re: all i want for christmas is my motor to work.

i have a shaft, and it runs fine. the pump just wont stay pumping i think there is blockage but i still am not sure how to get rid of the blockage

Ok so pump isn't the issue, did you do what Tashadaddy recommended and pull the stat? This thing should have a copper tube going into the water pump, shove the garden hose on to the copper tube and clamp it. Flush it and then test.

 

[R.Johnson]

Re: all i want for christmas is my motor to work.

What could you have possibly fixed, or checked going at that water pump like that? If I had'nt seen the photo, I would think someone was messing with me.

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

im gonna try taking the lower unit off again and flushing it like u said btheking. thanks. Rjohnson i dont think u understand why i cut it. when i was trying to remove the lower unit the spline came out the bottom unit instead of the powerhead. i took the motor fliped it upside down hooked a chain up to the driveshaft it lubed it all up and banged with a hammer and the driveshaft wouldnt come out, so i read up on it and im sure it wasnt removed for years so i assumed it was "froze" up in the powerhead. so in order to replace the water pump and get to those 3 bolts its the only choice i had, besides throwing the motor away. unless u got something else in mind

 

[bktheking]

Re: all i want for christmas is my motor to work.

If I understand correctly the drive shaft came out from the bottom instead of the top correct? So the lower unit assembly did come off?

Working on these motors when things are "stuck" in a patience thing, cutting the lower unit like you did while it may have worked for changing the water pump may lead to issues in the future. Two alternative approaches would be to flip the motor on it's top and run PB BLASTER down into the spline area for a few days until it free'd up or pulling the powerhead and heating it up with a torch until it free'd up. But it doesn't matter now, what is done is done. At minimum I recomment you take that motor to a welder and have the cuts welded up to prevent who know's what from getting into the leg of your motor.

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

that is exactly what i did except i let it sit upside down for 2weeks and nothing. and i used a whole can of PB blaster. i tried patience so i went with brutal force. ahaha

 

[bktheking]

Re: all i want for christmas is my motor to work.

that is exactly what i did except i let it sit upside down for 2weeks and nothing. and i used a whole can of PB blaster. i tried patience so i went with brutal force. ahaha

That's crazy, well at least you managed to save it, people see that cut up lower and don't know the rest of the story I guess so it doesn't make sense until explained.

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

finally someone understands!! ill let u know how the flushing goes tomorrow

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

so i flushed it out with a hose straight to the copper pipe(the water pump line) and it ran water through it fine, i let it flush for about ten mins and then put it all back together. when i started it up it pumped fine then when i put it in drive it stopped, so i put it back in neutral and still nothing. im still lost and do not know what to do next CAN ANYONE HELP?!?!?!?!?!

 

[bktheking]

Re: all i want for christmas is my motor to work.

When you pull the lower after this happen is the key still in where it needs to be for the water pump? Did you try running it with the stat "out" as a test?

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

stat? whats the stat?? yes the keyway is still in and the impeller spins with the flywheel so it must be in correct right?

 

[bktheking]

Re: all i want for christmas is my motor to work.

stat? whats the stat?? yes the keyway is still in and the impeller spins with the flywheel so it must be in correct right?

Correct. Stat is the "theromostat" in the powerhead, pull it to test.

 

[1946Zephyr]

Re: all i want for christmas is my motor to work.

I'm going to have to follow this thread closely

 

[R.Johnson]

Re: all i want for christmas is my motor to work.

In the special tool's catalog, there is a tool listed for pulling the drive shaft out of the pinion gear on the larger engines. This tool would be very simple to make. Could you have someone help you with that?

 

[CharlieB]

Re: all i want for christmas is my motor to work.

Nice job on the cut, great idea on how to gain access in the situation.

Now, back to your problem.

What parts did you use for your pump repairs?

If the housing and/or the bottom plate do not fit/warped/worn then they make work if the pump is SUBMERGED in water, but once launched and underway, the pump can rise with the boat and be above the water level, suck air in at low engine speeds, yet seem to pump SOME water at WOT RPM.

If if used a pump REPAIR kit, this could be your problem.

If you used a pump REPLACEMENT kit then either the bottom plate is at fault, or I'm barking up the wrong tree again.

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

i understand everything that your saying charlieb except about the plate... since the pump is bolted to the lower unit dont understand how it would lift up above the water level. the plate is worn a bit, it bends in a little in the middle...

 

[G DANE]

Re: all i want for christmas is my motor to work.

I made a simple puller for driveshafts. A water pipe threaded in both ends, with two end muffs. I drill holes in moffs that makes the driveshaft pass thru both end muffs. Screw both ends on the pipe, and put them on the driveshaft sitting in the cranckshaft. Use an ange grinder and grind a mark in the driveshaft ( still plenty strong ) Mark must be out of water pump, seal and bearing area. Put a wise grip in mark on driveshaft, as tight as you can. Unscrew une of the end muffs from the waterpipe and it will pull the shaft out of the cranckshaft. Worked for me two times.

 

[jasper60103]

Re: all i want for christmas is my motor to work.

I made a simple puller for driveshafts. A water pipe threaded in both ends, with two end muffs. I drill holes in moffs that makes the driveshaft pass thru both end muffs. Screw both ends on the pipe, and put them on the driveshaft sitting in the cranckshaft. Use an ange grinder and grind a mark in the driveshaft ( still plenty strong ) Mark must be out of water pump, seal and bearing area. Put a wise grip in mark on driveshaft, as tight as you can. Unscrew une of the end muffs from the waterpipe and it will pull the shaft out of the cranckshaft. Worked for me two times.

G DANE,
I would like to see a picture of the puller if you can.

 

[CharlieB]

Re: all i want for christmas is my motor to work.

i understand everything that your saying charlieb except about the plate... since the pump is bolted to the lower unit dont understand how it would lift up above the water level. the plate is worn a bit, it bends in a little in the middle...

Look at the top and bottom sides of a new impeller, you will see a 'ring' or line of raised material that forms the seal to the top and bottom of the pump. A worn upper cup and lower plate does not seal the impeller and will let it suck air in, down along side the shaft. As long as the whole pump is submerged there is no air and the impeller remains sealed, but once the boat is launched, check the water lilne on the housing, get the boat moving and recheck the water line on the housing, it drops, the leg dries out inside, the pump starts sucking air.

A new impeller may seal for a short time, till it first gets on a 'plane', dries out and quickly starts melting the edges.

Get a pump KIT, not just an impeller.

 

[KB1]

Re: all i want for christmas is my motor to work.

Good eve!

Just for curiousity sake, I'll put my .02 in here. Haven't noticed in reading if you have had this engine for a while, running good before, replacing the pump as it is time, or if it is new to you and trying to get it going.

Had a '71 40 h.p. 'rude that I couldn't get to pump. Made my head hurt for about 6 weeks. Had that thing apart and back together a BUNCH of times. No water! WTF!!

Ran into a mechanic @ shop I know, told the tale, said to check compression. If not good, probably blown head gasket keeping the pressure greater than what the impeller can force up the tube. The pump is fine, can't overcome the compression leaking into the water jacket keeping the water from circ'ing.

To make a long story longer, compression was off, which made me change the head gasket, which was burned between bottom cyl. and jacket, replaced said culprit, and life was good again.

Yours may be just showing up after it gets to a certain temp. before problem arises or it could be I don't have a CLUE if that is not it. GOOD LUCK and let us know how it turns out.

 

[shane56inlet]

Re: all i want for christmas is my motor to work.

thanks for everyones input. i have just been working a lot the past couple days so i havent had time to play with it.. but i got the boat n motor a couple months ago and it ran fine at first but it had trouble starting and idling out on the water. so i had my buddy help me out and it was the idle needle sucking in air. and while we were starting it in my dirve way i messed up with boating 101 and i didnt submerge the pump completely and burned out the impeller..... and now my prolbem still continues with the water pump but i will keep it updated!! im gonna try to test the stat tonight to see if it is in working order. thanks everyone again this site is the SHIZZLE!!!!