Go Back  Offshoreonly.com > Technical > General Q & A
Low water pressure >

Low water pressure

Notices

Low water pressure

Thread Tools
 
Old 07-01-2006, 02:49 PM
  #1  
Charter Member#157
Charter Member
Thread Starter
 
MnFastBoat's Avatar
 
Join Date: Oct 2000
Location: Minneapolis, Mn, Usa
Posts: 1,859
Likes: 0
Received 3 Likes on 3 Posts
Default Low water pressure

Last couple times out, yes this was happening during the drive fluid over flowing also, I was not getting the same amount of water flow through the port motor as the starboard.
To test I pulled the same hoses off the T-housing and started up. I would say half the amount of force at best.
All hoses have been back flushed many many times.
Last two times i back flushed the intake hose I did get a few pebbles back out of the drive nose
But now it is full flowing.
When running even mild rpm--3000-- the motor starts to get hot.
I want to pull the drive and check the internal hose.
A few tell me that the inserts could be closing on it self when getting up to temp.
What is involved in removing them? I see a special tool needed.
What else would it be?
__________________
This Cat is trying to keep up with the Big Dogs
MnFastBoat is offline  
Old 07-02-2006, 01:51 AM
  #2  
Registered
 
RedDog382's Avatar
 
Join Date: Sep 2003
Location: Toledo, Ohio/Las Vegas, NV
Posts: 3,029
Likes: 0
Received 1 Like on 1 Post
Default Re: Low water pressure

How old is the impeller in the raw water pump?
RedDog382 is offline  
Old 07-02-2006, 05:10 PM
  #3  
Registered
 
monstaaa's Avatar
 
Join Date: Feb 2005
Location: long island, newyork
Posts: 2,551
Likes: 0
Received 2 Likes on 2 Posts
Default Re: Low water pressure

thats known as bravo fever and it is not too bad. remove outdrive, there is the nylon insert there. needs merc tool. then on the inner transom plate remove the water inlet housing( behind engine just above input shaft). the 1 1/4 hose from water pump is going to it. 2, 7 /16 bolts hold it in place. there is the same nylon insert there as on the outside. remove both inserts , remove hose, and your done. upon installation DO NOT rotate hose at all when installing or as you tighten for this will cause the hose to kink under trim causing a starvation problem.

when you remove the inserts you will notice corrosion build up, or the hose itself appearing to have a small inside diameter.

good luck
monstaaa is offline  
Old 07-03-2006, 10:32 PM
  #4  
Registered
Gold Member
 
MnHowardCat's Avatar
 
Join Date: Jul 2002
Location: Minnesota
Posts: 404
Likes: 0
Received 2 Likes on 2 Posts
Default Re: Low water pressure

Hugh where have you been thought I would have seen you this weekend If you need a hand give me a call
Don
MnHowardCat is offline  
Old 07-05-2006, 09:16 AM
  #5  
Charter Member#157
Charter Member
Thread Starter
 
MnFastBoat's Avatar
 
Join Date: Oct 2000
Location: Minneapolis, Mn, Usa
Posts: 1,859
Likes: 0
Received 3 Likes on 3 Posts
Default Re: Low water pressure

Originally Posted by RedDog382
How old is the impeller in the raw water pump?
Brand new, inlcuding the housing
__________________
This Cat is trying to keep up with the Big Dogs
MnFastBoat is offline  
Old 07-05-2006, 09:36 AM
  #6  
Charter Member#157
Charter Member
Thread Starter
 
MnFastBoat's Avatar
 
Join Date: Oct 2000
Location: Minneapolis, Mn, Usa
Posts: 1,859
Likes: 0
Received 3 Likes on 3 Posts
Default Re: Low water pressure

Originally Posted by monstaaa
thats known as bravo fever and it is not too bad. remove outdrive, there is the nylon insert there. needs merc tool. then on the inner transom plate remove the water inlet housing( behind engine just above input shaft). the 1 1/4 hose from water pump is going to it. 2, 7 /16 bolts hold it in place. there is the same nylon insert there as on the outside. remove both inserts , remove hose, and your done. upon installation DO NOT rotate hose at all when installing or as you tighten for this will cause the hose to kink under trim causing a starvation problem.

when you remove the inserts you will notice corrosion build up, or the hose itself appearing to have a small inside diameter.

good luck
This is the second time I have heard this.
Thinking this is the most likley culprit
Question, what o-ring kit do i need or is it needed, to pull the outdrive off?
Or can you just pull and re-install?
__________________
This Cat is trying to keep up with the Big Dogs
MnFastBoat is offline  
Old 07-05-2006, 09:37 AM
  #7  
Charter Member#157
Charter Member
Thread Starter
 
MnFastBoat's Avatar
 
Join Date: Oct 2000
Location: Minneapolis, Mn, Usa
Posts: 1,859
Likes: 0
Received 3 Likes on 3 Posts
Default Re: Low water pressure

Originally Posted by MnHowardCat
Hugh where have you been thought I would have seen you this weekend If you need a hand give me a call
Don
Sorry had so much going on
Been meaning to call and see how things been?
__________________
This Cat is trying to keep up with the Big Dogs
MnFastBoat is offline  
Old 07-11-2006, 09:01 PM
  #8  
Charter Member#157
Charter Member
Thread Starter
 
MnFastBoat's Avatar
 
Join Date: Oct 2000
Location: Minneapolis, Mn, Usa
Posts: 1,859
Likes: 0
Received 3 Likes on 3 Posts
Default Re: Low water pressure

anyone know where I can locate the tool to remove the plugs talked about here?
__________________
This Cat is trying to keep up with the Big Dogs
MnFastBoat is offline  
Old 07-11-2006, 09:22 PM
  #9  
Registered
 
GOODT's Avatar
 
Join Date: Apr 2005
Location: KENT ISLAND, MARYLAND
Posts: 2,675
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Low water pressure

you can get it from any merc dealer
GOODT is offline  
Old 07-11-2006, 10:32 PM
  #10  
Registered
 
vandeano's Avatar
 
Join Date: Sep 2004
Location: Torrance, California
Posts: 362
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Low water pressure

Originally Posted by MnFastBoat
anyone know where I can locate the tool to remove the plugs talked about here?

I used a pair of needle nose. The needle nose when open just right can be used to fit in the plastic groves. It worked for me anyway.
vandeano is offline  


Quick Reply: Low water pressure


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.