Impeller replacement Merc 5hp - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Outboard
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 04-05-2014
Junior Member
 
Join Date: Mar 2014
Location: Galesville, MD
Posts: 18
Thanks: 20
Thanked 0 Times in 0 Posts
Rep Power: 0
jballou is on a distinguished road
Impeller replacement Merc 5hp

Looks like I will be needing to replace the impeller on my Merc 5hp. Or at least the outboard is not peeing.

I have the replacement kit.

Anything special I need to be aware about? Is this a tricky job? First time doing this.

Thanks for any advice.

jballou
Reply With Quote Share with Facebook
  #2  
Old 04-05-2014
newhaul's Avatar
islander bahama 24
 
Join Date: Feb 2010
Location: kingston WA
Posts: 645
Thanks: 6
Thanked 20 Times in 20 Posts
Rep Power: 5
newhaul is on a distinguished road
Re: Impeller replacement Merc 5hp

Nothing tricky to it its rather straight forward the only thing to watch and insure its correct is the proper direction of rotation on the impeller also I find that a spray with WD40 works great to facilitate the installation of the new impeller
__________________
Illegitimus Non Tatum Carborundum.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 04-05-2014
Junior Member
 
Join Date: Mar 2014
Location: Galesville, MD
Posts: 18
Thanks: 20
Thanked 0 Times in 0 Posts
Rep Power: 0
jballou is on a distinguished road
Re: Impeller replacement Merc 5hp

Great! Thanks. Anything else that could be preventing water flow through the pump that I should check out?
Reply With Quote Share with Facebook
  #4  
Old 04-05-2014
OPossumTX's Avatar
Senior Member
 
Join Date: Jul 2011
Location: Alvin, Texas
Posts: 146
Thanks: 20
Thanked 3 Times in 3 Posts
Rep Power: 4
OPossumTX is on a distinguished road
Re: Impeller replacement Merc 5hp

Around here, any stoppage involving a small hole should be checked to rule out mud dauber infestation. These pests will fill any small hole with their mud nests, spiders and their eggs/larva. I have to clean out the discharge hole on my little British Seagull outboard every spring and as necessary throughout the summer.

Have FUN!
O'

Last edited by OPossumTX; 04-05-2014 at 12:27 PM.
Reply With Quote Share with Facebook
The Following User Says Thank You to OPossumTX For This Useful Post:
jballou (04-05-2014)
  #5  
Old 04-05-2014
Senior Member
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 6,872
Thanks: 2
Thanked 100 Times in 98 Posts
Rep Power: 7
dabnis is on a distinguished road
Re: Impeller replacement Merc 5hp

Quote:
Originally Posted by jballou View Post
Great! Thanks. Anything else that could be preventing water flow through the pump that I should check out?
No experience with your motor. On mine the thermostat could get plugged up, but there was a small by-pass hole in the housing, allowing a small bit of water to pass, maybe not enough to flow out the pee hole. Checking the thermostat might be easier than changing the impeller. Or, if the motor is not overheating, the pee hole may be plugged? Pulling the head to check for plugged water passages may also be easier than changing the impeller.

I have changed a few impellers and found that getting the water feed tube back into the power head was challenging. Finally figured out that tipping the motor upside down made it a lot easier to see what I was doing.

Paul T
Reply With Quote Share with Facebook
The Following User Says Thank You to dabnis For This Useful Post:
jballou (04-05-2014)
  #6  
Old 04-06-2014
newhaul's Avatar
islander bahama 24
 
Join Date: Feb 2010
Location: kingston WA
Posts: 645
Thanks: 6
Thanked 20 Times in 20 Posts
Rep Power: 5
newhaul is on a distinguished road
Re: Impeller replacement Merc 5hp

The five HP merc its easier to change the impeller however a length of bailing wire into the pee hose would clear any minor blockages also the pee water is derived from the exhaust cooling water check the impeller first they should be inspected annually anyway (ounce of prevention and all ) also the water cooling feed line boot is in the lower unit on the little mercs.
__________________
Illegitimus Non Tatum Carborundum.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
The Following User Says Thank You to newhaul For This Useful Post:
jballou (04-06-2014)
  #7  
Old 04-19-2014
Junior Member
 
Join Date: Mar 2014
Location: Galesville, MD
Posts: 18
Thanks: 20
Thanked 0 Times in 0 Posts
Rep Power: 0
jballou is on a distinguished road
Re: Impeller replacement Merc 5hp

OK - thanks everyone for the useful comments. Impeller has been replaced - not difficult at all!

But now I am having trouble re-inserting the lower unit back into the drive shaft housing. Unit will go in until it feels like the drive shaft is bumping up against something - about 3" short. So the drive shaft is not going in enough. Gear shift is in reverse.

Any ideas on what might be the problem and how to solve it would be greatly appreciated!

cheers - jballou

Last edited by jballou; 04-19-2014 at 11:55 AM.
Reply With Quote Share with Facebook
  #8  
Old 04-19-2014
Senior Member
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 6,872
Thanks: 2
Thanked 100 Times in 98 Posts
Rep Power: 7
dabnis is on a distinguished road
Re: Impeller replacement Merc 5hp

Quote:
Originally Posted by jballou View Post
OK - thanks everyone for the useful comments. Impeller has been replaced - not difficult at all!

But now I am having trouble re-inserting the lower unit back into the drive shaft housing. Unit will go in until it feels like the drive shaft is bumping up against something - about 3" short. So the drive shaft is not going in enough. Gear shift is in reverse.

Any ideas on what might be the problem and how to solve it would be greatly appreciated!

cheers - jballou
It is possible that the splines are not lined up on either, or both, the power head or gear box. With the spark plug removed, try turning the engine over, slowly and then the prop with it in gear. I hope you did not take the shaft out of the gear casing as it may be difficult to re-insert it? No experience with your particular motor, but IIRC on OMC motors, the gears may "mis-align" when the shaft is removed.

Paul T
Reply With Quote Share with Facebook
The Following User Says Thank You to dabnis For This Useful Post:
jballou (04-19-2014)
  #9  
Old 04-19-2014
Junior Member
 
Join Date: Mar 2014
Location: Galesville, MD
Posts: 18
Thanks: 20
Thanked 0 Times in 0 Posts
Rep Power: 0
jballou is on a distinguished road
Re: Impeller replacement Merc 5hp

Yup. It was just a line-up problem. A matter of getter it exact.

Thanks.
Reply With Quote Share with Facebook
  #10  
Old 04-19-2014
Senior Member
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 6,872
Thanks: 2
Thanked 100 Times in 98 Posts
Rep Power: 7
dabnis is on a distinguished road
Re: Impeller replacement Merc 5hp

Quote:
Originally Posted by jballou View Post
Yup. It was just a line-up problem. A matter of getter it exact.

Thanks.
Life is good!!

Paul T
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanamar 4JHE Impeller Replacement sachemgfp Gear & Maintenance 2 06-07-2012 06:32 PM
Impeller replacement problem deborahmaas Diesel 9 08-16-2011 01:23 AM
Can't engage pull start on 1988 Merc 5hp outboard foxglove Gear & Maintenance 4 10-09-2010 01:51 AM
Impeller replacement on westerbeke sailortjk1 Gear & Maintenance 10 07-16-2007 07:44 PM


All times are GMT -4. The time now is 04:11 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.