Reply
 
Thread Tools Search this Thread
 
Old 19 April 2004, 13:33   #1
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Mariner 40hp cooling system

I took my new Mariner 40hp out for a little ouoting today. Started it up, an a small but steady stream of cooling water came out of the tell-tale. After a little whilse it stopped all together. I stopped the engine, checked the water intake, and all seemed well. Started her up again, and same as before - small steady stream. Then same happened again - stopped after a short time (20/30 seconds maybe). The stream of water coming out when the dealer demostrighted it to me was much bigger (or so I remember).
Would I be right in saying that Mariner outboards have a thermostatic cooling system in them, so that the water will only really start pumping if the engine warms up (I did feel the cowling but this felt stone cold). The engine wasn't running for long in the end, as the water looked a bit too choppy when we got to the mouth of the harbour, so turned back.
__________________

__________________
Tim M is offline   Reply With Quote
Old 19 April 2004, 13:38   #2
Member
 
Country: Ireland
Town: Carigaline/Baltimore
Boat name: XS-600
Make: XS-Ribs
Length: 6m +
Engine: Merc Optimax 150 XL
Join Date: Feb 2004
Posts: 682
Don't know much about the actual cooling system, but caked up salt blocked the tell-tale on our old Merc 75 before. Always one to look out for!! Boy did we look stupid!!
__________________

__________________
Steve G
If In Doubt, Go Flat Out!!
swginn is offline   Reply With Quote
Old 19 April 2004, 13:40   #3
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
I don't think it could be salt; the engine was demostraighted to me in a freshwater tank. That was the last time it was started before today.
__________________
Tim M is offline   Reply With Quote
Old 19 April 2004, 13:45   #4
tue
Member
 
Country: UK - England
Town: Paignton, Devon
Make: Chinook and Viking
Length: 7m +
Engine: 150 Etec + 125 Merc
Join Date: Jul 2003
Posts: 526
Mariner do use a thermostatic cooling system on some of their outboards including some 40hps depending on age and type. Generally they don't show any water out of the tell tale untill the stat opens and allows the water to flow past. If the water is running a little bit then stops the cause is usually some crap in the tell tale pipe. Get something thin
(paper clip etc) and slide into tell tale when engine is running. Should unblock and pour out again.
__________________
**Paul**
Brixham BSAC
tue is offline   Reply With Quote
Old 19 April 2004, 15:00   #5
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,335
I would agree, the do tend to get bloked up with crap!!.
If it still stays bloked pull the hose off the fitting (inside the bottom cowl) and start it up you should get loads of water coming out.
__________________
Turbodiesel is offline   Reply With Quote
Old 19 April 2004, 15:06   #6
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Thanks for the advice; I'll give it a go.

Roughly how long will it take the cooling system to start pumping water from a cold start (given that this engine has a thermostaticly controlled cooling system)?
__________________
Tim M is offline   Reply With Quote
Old 19 April 2004, 15:29   #7
tue
Member
 
Country: UK - England
Town: Paignton, Devon
Make: Chinook and Viking
Length: 7m +
Engine: 150 Etec + 125 Merc
Join Date: Jul 2003
Posts: 526
depending on the water temp and supply method (muffs or in sea) about 1-3 minutes.
__________________
**Paul**
Brixham BSAC
tue is offline   Reply With Quote
Old 19 April 2004, 15:57   #8
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
I just took the pipe off, and it was full of crap - that would explain the problem!
__________________
Tim M is offline   Reply With Quote
Old 19 April 2004, 17:38   #9
Member
 
Country: Germany
Town: Flensburg
Make: Avon Searider
Length: 4m +
Engine: Suzuki DT75 ?
Join Date: Feb 2004
Posts: 50
Hi Tim,

I`ve been using a 15hp Merc last summer and that bitch behaved exactly like in your description! It showed a good beam at the start and suddenly it cut it down to zero- nothing out of the pisser anymore and my pulse-rate up in the red- panic! Motor still running fine though.... Just when I jumped to the stern to kill that sucker it started pissing out some little drops and then a steady beam again- got used to it finally, but it`s not the way I`d engineer it..... you`ve got to grow some nerves to stand it! My horror always was: What, when the beam doesn´t come back this time?! I have to admit that this motor only did so at idle speed or with very low rpm`s- when I brought it up to at least 1/3 throttle this behaviour stopped completly and I had the steady beam all the time.
greetings,
Wolfgang
__________________
ribfreak is offline   Reply With Quote
Old 20 April 2004, 05:31   #10
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
I too think the design of the tell-tale of very stupid; the pipe that feeds the hole is quite big, maybe 10mm, but the hole on the end is only about 3 or 4! What's that point in having such a tiny hole????
__________________

__________________
Tim M 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 19:16.


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