Reply
 
Thread Tools Search this Thread
 
Old 03 July 2013, 12:59   #1
Member
 
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 239
Yamaha 4hp 2 stroke

HI.
I have a blockage where the water pipe from the pump enters the power head, most of the cooling water goes inside the leg and I only get a dribble from the tell tale. I have been informed that this is most likely due to corrosion dislodging the seal and blocking the end of the pipe. It looks like the power head will have to come off, I don't have a manual for this o/b. So I was hoping someone on here can tell me how to get the head off.
Cheers.
__________________

__________________
Mercury is offline   Reply With Quote
Old 03 July 2013, 13:00   #2
Member
 
paddlers's Avatar
 
Country: UK - England
Town: Sticks, N.Yorks
Boat name: Tamanco
Make: Honwave 3.5AE
Length: 3m +
Engine: Tohatsu Outboard
Join Date: May 2012
Posts: 1,063
Have you had the thermostat out yet ?
__________________

__________________
paddlers is offline   Reply With Quote
Old 03 July 2013, 13:20   #3
Member
 
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 239
Quote:
Originally Posted by paddlers View Post
Have you had the thermostat out yet ?
I did not know it had one, where is it?
__________________
Mercury is offline   Reply With Quote
Old 03 July 2013, 13:33   #4
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Engines with 5HP and lower, usually doen't have/use a thermostat. Need to pull complete head from pan to check upper water tube & grommets condition.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 03 July 2013, 13:53   #5
Member
 
Festinghouse's Avatar
 
Country: UK - England
Town: Chorley / Holyhead
Boat name: Northwind Challenger
Make: Tornado
Length: 6m +
Engine: Mariner 115 efi CT
MMSI: 235080598
Join Date: Jun 2011
Posts: 1,398
RIBase
Send a message via Skype™ to Festinghouse
removal of powerhead is easy, disconect the throttle cable from carb, disconnect / remove coil, then undo the small bolts underneath the 'tray'.
i did mine over winter and completely cleaned all the waterways etc and still it only dribbles out water!
__________________
"Life may often suck, but the alternative is unacceptable"
MMSI Sticker

Member of S.A.B.S. (Lancashire Division)
Festinghouse is offline   Reply With Quote
Old 04 July 2013, 13:29   #6
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
When you say you've cleaned all waterways, was cylinder head also removed and cleaned ? If not, there are wider waterways there that can cause poor peeing when having excess of salt layers and or salt crusts on waterways.

If water pump is in inmaculate working condition, probably peeing port still has a small obstruction inside of engine, run a thin wire up-down several times to clear.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 04 July 2013, 13:38   #7
Member
 
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 239
Quote:
Originally Posted by Locozodiac View Post
When you say you've cleaned all waterways, was cylinder head also removed and cleaned ? If not, there are wider waterways there that can cause poor peeing when having excess of salt layers and or salt crusts on waterways.

If water pump is in inmaculate working condition, probably peeing port still has a small obstruction inside of engine, run a thin wire up-down several times to clear.

Happy Boating
Hi,
Many thanks for your interest, I did not say I have cleaned all the waterways. What I said was I need to take the power head off to clean the waterways, but not having a manual I was asking advise on how to do the job.
__________________
Mercury is offline   Reply With Quote
Old 04 July 2013, 13:48   #8
Member
 
Country: UK - England
Length: 4m +
Join Date: Jun 2013
Posts: 39
blow air up the tell tail while running
__________________
kernowsr4 is offline   Reply With Quote
Old 04 July 2013, 14:28   #9
Member
 
Festinghouse's Avatar
 
Country: UK - England
Town: Chorley / Holyhead
Boat name: Northwind Challenger
Make: Tornado
Length: 6m +
Engine: Mariner 115 efi CT
MMSI: 235080598
Join Date: Jun 2011
Posts: 1,398
RIBase
Send a message via Skype™ to Festinghouse
Quote:
Originally Posted by Mercury View Post
Hi,
Many thanks for your interest, I did not say I have cleaned all the waterways. What I said was I need to take the power head off to clean the waterways, but not having a manual I was asking advise on how to do the job.
i think he was talking to me - i cleaned the waterways!
without actually looking im not sure if that engine has a cylinder head or not (could be a blind bore) but if it does then i did not remove it. i did hover remove the exhaust plate from its side - that was completely clear, but all the waterways around the base of the powerhead were pretty furred up.
also looking at the shape of the waterways from the tell tale back, you realise that a piece of wire poked up there wont actually get very far, but of course its still worth trying!
__________________
"Life may often suck, but the alternative is unacceptable"
MMSI Sticker

Member of S.A.B.S. (Lancashire Division)
Festinghouse is offline   Reply With Quote
Old 04 July 2013, 17:41   #10
Member
 
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 239
Quote:
Originally Posted by Festinghouse View Post
i think he was talking to me - i cleaned the waterways!
without actually looking im not sure if that engine has a cylinder head or not (could be a blind bore) but if it does then i did not remove it. i did hover remove the exhaust plate from its side - that was completely clear, but all the waterways around the base of the powerhead were pretty furred up.
also looking at the shape of the waterways from the tell tale back, you realise that a piece of wire poked up there wont actually get very far, but of course its still worth trying!
Yes I think you right, I realized after that he was talking to you.
Anyway I have managed to remove the power head, (Thanks to all who gave advice) and can clearly see the waterways and inlet pipe. I shall give them a good going over first chance I get.
__________________

__________________
Mercury is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:07.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.