| Author |
Message |
    
rich a
New member
Username: tanker2221
Post Number: 2
Registered: 11-2008
| | Posted on Friday, July 17, 2009 - 11:12 pm: | 
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hi guys when i run my aq211a with 290a duo prop drive its not pumping water when run on the muffs . nothing coming out of exhaust pulled hoses off exhaust manifolds no water getting to them. pulled the impellor was bad so replaced . but still not getting water up to engine , do i have a blockage somewhere ? i also plug the little hole on the lowwer unit when running on muffs but still nothing |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 408
Registered: 03-2009
| | Posted on Friday, July 17, 2009 - 11:26 pm: |
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More than likely NOT blockage! Possibly a suction issue!
When was the last time that the *water neck fitting, *S hose connection, *Lower Unit "pivot tube" O-ring, etc. were checked and/or replaced?
One small suction leak at any of these points, and this system will not pick up water.
When in the lake/river/ocean, these components are submerged, so suction leaks can become "masked", so to speak, (until we get up on plane).
If all is good, this sea water pump should self prime if water flow is present. |
rich a
New member
Username: tanker2221
Post Number: 3
Registered: 11-2008
| | Posted on Saturday, July 18, 2009 - 08:38 am: |
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i pulled the lower unit the other day could somthing have not gone back togther correctly? |
Robert A. Fierro
Advanced Member
Username: sandkicker
Post Number: 725
Registered: 06-2008
| | Posted on Saturday, July 18, 2009 - 08:48 am: |
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Always possible that you did not replace the water pickup hose (S hose). It's the approx 1" hose between the bellows. Also... loose hose clamp on either end of this hose, or other items as Ricardo indicated. |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 411
Registered: 03-2009
| | Posted on Saturday, July 18, 2009 - 09:10 am: |
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Rich, the reason that I suggested "NOT blockage....... but possibly a suction issue", was because the system "pulls" water up from the drive, not pumps it (as an Alpha drive does)! Therefore any air leak on the suction side will kill the suction and water delivery.
This is to NOT discount the possibility of blockage....... that is certainly worth looking into!
Now.... Let's clarify something here..... when you say "Lower Unit" are you meaning Lower Unit, as in the lowest section of the three drive components? (Transmission, Intermediate and Lower)
Some refer to the entire drive as a "Lower Unit". (just asking on that because this may involve other parts)
But yes..... if you pulled the just lower unit and did NOT replace all three O rings, this could be part or all of the problem. We must replace these O-rings each and every time!
All are important, but w/ regard to water path, the lowest pivot tube O-ring forms a critical seal to the lower unit housing.
Water Neck Fitting and the "Beaded Gasket": These are two very important parts of the system in-that the water neck will corrode and live a relatively short life........... and the beaded gasket looses resiliency over time!
These must be routinely replaced. No exceptions! |
rich a
Member
Username: tanker2221
Post Number: 4
Registered: 11-2008
| | Posted on Saturday, July 18, 2009 - 09:34 am: |
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yes just had the lower unit off. i bought boat with bad drive , they told me lower unit was bad . so i started there since i had a spare drive from my other boat. with lower unit on boat couldnt move peops in neutral. so pulled lower unit once off props spin lower unit spins perfect . found bad upper shifter was locked up chunks of gears were in it , bad news . but put my new upper on and bolted the lower back on , . no water pumping, wull take lower back off and see bout the orings. |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 413
Registered: 03-2009
| | Posted on Saturday, July 18, 2009 - 09:52 am: |
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Rich! Hold everything!
We cannot arbitrarily swap one lower (or upper) to a different "Intermediate" housing without first performing a critical shimming procedure!
Hold the fort if you have not re-shimmed the new transmision and/or this new lower unit!
You will risk damage if this is not done!
One of us can help you with the process!
Also, you must take the original vertical shaft tapered roller bearing "race" with the lower unit over to it's new location.
(We do not want to mix/match used bearing components!)
.
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rich a
Member
Username: tanker2221
Post Number: 5
Registered: 11-2008
| | Posted on Saturday, July 18, 2009 - 11:34 am: |
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did not switch lower unit same lower unit. shimmed new upper |
rich a
Member
Username: tanker2221
Post Number: 6
Registered: 11-2008
| | Posted on Saturday, July 18, 2009 - 11:34 am: |
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just doesent pump water |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 415
Registered: 03-2009
| | Posted on Saturday, July 18, 2009 - 01:04 pm: |
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You either have a pump problem or a suction leak issue. |
rich a
Member
Username: tanker2221
Post Number: 7
Registered: 11-2008
| | Posted on Saturday, July 18, 2009 - 03:06 pm: |
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found a brass plug on the engine missing , pulling little water now. and thermostat was jammed ... will try these things and get back with ya |
