Yamaha motor water pressure problems
 

Took my boat to HD Marine last week. They cleaned out the popit valve -
something like a thermostat. It is behind the electronic stuff on the
back of the motor and took a while to get to. It had grit in it. They
also replaced the water pump impeller - it was a little worn.

They said the popit valve stayed closed at low speeds to build up
pressure then opened at high speeds so I am not sure how it could affect
the high speed water pressure. Anyway, I now have water pressure.

The low water pickup on those HPDI motors may be the problem. Like Rich
said, I will be real careful from now own in shallow water.

Ronnie

http://fishing.about.com

http://bbcboards.zeroforum.com/zeroforum?id=54



"Ronnie Garrison" wrote in message
...
Took my boat to HD Marine last week. They cleaned out the popit valve -
something like a thermostat. It is behind the electronic stuff on the back
of the motor and took a while to get to. It had grit in it. They also
replaced the water pump impeller - it was a little worn.

They said the popit valve stayed closed at low speeds to build up pressure
then opened at high speeds so I am not sure how it could affect the high
speed water pressure. Anyway, I now have water pressure.

The low water pickup on those HPDI motors may be the problem. Like Rich
said, I will be real careful from now own in shallow water.

Ronnie

http://fishing.about.com

Ronnie Garrison wrote:
Took my boat to HD Marine last week. They cleaned out the popit valve -
something like a thermostat. It is behind the electronic stuff on the
back of the motor and took a while to get to. It had grit in it. They
also replaced the water pump impeller - it was a little worn.

They said the popit valve stayed closed at low speeds to build up
pressure then opened at high speeds so I am not sure how it could affect
the high speed water pressure. Anyway, I now have water pressure.

The low water pickup on those HPDI motors may be the problem. Like Rich
said, I will be real careful from now own in shallow water.

Ronnie

http://fishing.about.com

Ronnie,

did they say by chance when the impeller should be changed. I have a 5
year old Yamaha 150 that is still pumping strong, but I'm thinking that
it should be changed this fall

BD

"Bill Durham" wrote in message
...
Ronnie Garrison wrote:
Took my boat to HD Marine last week. They cleaned out the popit valve -
something like a thermostat. It is behind the electronic stuff on the
back of the motor and took a while to get to. It had grit in it. They
also replaced the water pump impeller - it was a little worn.

They said the popit valve stayed closed at low speeds to build up
pressure then opened at high speeds so I am not sure how it could affect
the high speed water pressure. Anyway, I now have water pressure.

The low water pickup on those HPDI motors may be the problem. Like Rich
said, I will be real careful from now own in shallow water.

Ronnie

http://fishing.about.com

Ronnie,

did they say by chance when the impeller should be changed. I have a 5
year old Yamaha 150 that is still pumping strong, but I'm thinking that it
should be changed this fall

I might be just a tad anal about motor maintenance, but I change my impeller
every other year.
--
Steve @ OutdoorFrontiers
http://www.outdoorfrontiers.com
G & S Guide Service and Custom Rods
http://www.herefishyfishy.com

Steve @ OutdoorFrontiers wrote:
"Bill Durham" wrote in message
...




I might be just a tad anal about motor maintenance, but I change my impeller
every other year.

Steve,

I wouldn't argue with you about that...I have looked through the manual
and there is no reference at all to changing the impeller. I was just
curious if anybody has heard anything official from Yamaha about
changing them.

BD

Bill Durham wrote:
Ronnie Garrison wrote:

Took my boat to HD Marine last week. They cleaned out the popit valve
- something like a thermostat. It is behind the electronic stuff on
the back of the motor and took a while to get to. It had grit in it.
They also replaced the water pump impeller - it was a little worn.

They said the popit valve stayed closed at low speeds to build up
pressure then opened at high speeds so I am not sure how it could
affect the high speed water pressure. Anyway, I now have water pressure.

The low water pickup on those HPDI motors may be the problem. Like
Rich said, I will be real careful from now own in shallow water.

Ronnie

http://fishing.about.com


Ronnie,

did they say by chance when the impeller should be changed. I have a 5
year old Yamaha 150 that is still pumping strong, but I'm thinking that
it should be changed this fall

BD
They didn't say, but they would probalby reccomend every year. I would
not change one unless the water pressure started to drop.

--
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