Don't rule out the possibility that when the impeller was
changed, the rubber seal ring wasn't properly seated. The impeller
needs to be installed carefully.
I assume the entry screen at the base of the drive has been
checked for blockage.




On 10 Jul 2005 08:39:45 -0700, "boater101"
wrote:

OK. Lots of updates as I have been busy trouble-shooting the various
avenues...

First to answer some questions :
snip
Butch Davis asked : I'm assuming this is a sterndrive.
Dry asked : The question should be did he run the engine up to temp.
and wait for a call for cooling.
Woodchuck asked : When was the impeler last changed in the lower unit?
It's a good place to start.
/snip

- Yup, it's a sterndrive.
- Yes, the motor reached operating temp while the thermostat was in
place...However, now that I've pulled the thermostat out, would it even
matter whether the motor reaches temp or not. At this point, I'm just
trying to get water flowing.
- The Impeller has been changed.

Now for some updates :
- I tested to make sure the impeller was turning. Basically pulled the
impeller housing off and started the engine...impeller was turning
fine.
- I tested for any blockage between the impeller unit on the outdrive
into the engine compartment. From within the boat's engine
compartment, I pulled the hose coming from the sterndrive/impeller.
This is the hose located near the back of the engine, where the engine
meets the outdrive, not up near the thermostat. I then pulled the
impeller unit off on the outside/outdrive. Using a garden hose from
the engine compartment I was able to run water backwards out thru to
the impeller...basically, no blockage.
- Put the impeller unit back onto the outdrive BUT left the hose off on
the inside (engine compartment). I then started the motor to see if
any flow would at lease come in...still nothing.
- I've also tested both hoses within the engine compartment coming from
the impeller nozzle, both have no blockage.
- I did "not" test the "filter" (at least I think it's a filter). It
looks like a large version of an inline fuel filter. I didn't bother
testing this as I wasn't getting any flow into the engine compartment
anyway. This filter (or whatever it is) is placed within the engine
compartment between the impeller nozzle and the thermostat, thus the
need for two different hoses...one from the impeller nozzle to this
filter, then a second hose from the filter to the thermostat.

Anyway, I'm running out of options...Does anyone have any other ideas?


thx in advance,

adym