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#1
August 11th, 2005, 12:54 AM
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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 
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#2
August 11th, 2005, 03:05 AM
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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
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#3
August 23rd, 2005, 04:36 AM
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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
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#4
August 23rd, 2005, 12:17 PM
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"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
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#5
August 25th, 2005, 03:00 AM
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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
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#6
September 5th, 2005, 04:30 AM
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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. -- ÐÏࡱá
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