Reply
 
Thread Tools Search this Thread
 
Old 02 January 2010, 14:42   #1
Member
 
Country: Belgium
Length: 5m +
Join Date: Jan 2008
Posts: 90
fuel leak engine / white smoke

today we went for a ride on the sea (read: test ride) with the humber with a 150 mariner 2 stroke

arriving at slipway with motor full trimmed out, I saw some fuel leaking out of the outboard case...

Couple of minutes before that I pushed the fuel ball very good, maybe that's the point

can this be a carb problem?

point 2, when starting the engine, lot of thick white smoke so no problem for this temperature and 2 stroke, but when the engine is hot, there is still a lot of white smoke (like steam) but rather clear (no gray or black smoke)
is this normal?

a side those 2 points the engine runs fine and reacts immediately
__________________

__________________
BarflyRIB is offline   Reply With Quote
Old 02 January 2010, 15:57   #2
Member
 
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
MMSI: TBC
Join Date: Dec 2006
Posts: 4,013
Quote:
Originally Posted by BarflyRIB View Post
today we went for a ride on the sea (read: test ride) with the humber with a 150 mariner 2 stroke

arriving at slipway with motor full trimmed out, I saw some fuel leaking out of the outboard case...

Couple of minutes before that I pushed the fuel ball very good, maybe that's the point

can this be a carb problem?
You may have overpumped the bulb there is no need to go wild with it especially if the engine is already running
Quote:
Originally Posted by BarflyRIB View Post
point 2, when starting the engine, lot of thick white smoke so no problem for this temperature and 2 stroke, but when the engine is hot, there is still a lot of white smoke (like steam) but rather clear (no gray or black smoke)
is this normal?

a side those 2 points the engine runs fine and reacts immediately
White smoke is probably the choke sending in more fuel and steam is possibly normall to see especially in cold weather.

If you are not sure however it may be worth getting it checked out especially if its new to you.
__________________

__________________
---------------------------------------------------
Chris Stevens

Born fiddler
Chris is offline   Reply With Quote
Old 02 January 2010, 16:49   #3
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
Everything Chris said really.

However I would check my fuel connections under the hood, get someone to pump the Bulb whilst you look around the fuel fittings and carbs to see where it's coming from. If it's coming from the Carbs then by pumping the bulb and putting the fuel under pressure it's seeping/leaking past the float needle valve. This might need replacement, cleaning or adjustment. Does she leak when the engines running?

As for the steam! I've seen some outboards that steam loads and some that don't and different levels in between all in normal operation. Get it checked out if you're worried.
__________________
Andy

Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
Hightower is offline   Reply With Quote
Old 03 January 2010, 11:29   #4
Member
 
Country: Belgium
Length: 5m +
Join Date: Jan 2008
Posts: 90
thanks for the answers - other people also told me it can be the float needle valve because today I checked the lowest carb with the air filter off and indeed, there is running fuel out when press the bulb too much
__________________
BarflyRIB is offline   Reply With Quote
Old 04 January 2010, 03:52   #5
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,611
You got the needle valve. Easy to fix by bending the bits of metal slightly (assuming of course the needle isnlt gubbed.

Remember also in the cold weather you will see a lot more condensation. How old is the engine? I have a Johnson 25 (1972 vintage) that has no tell- tale and is pre thru' prop exhaust. All the idle cooling water is pushed through the idle ports, and so the only way you know the pump is working OK is if there IS steam!

Also if you can, try it with a different fuel tank - there may be some diesel contamination - that also produces white smoke.
__________________
9D280 is offline   Reply With Quote
Old 04 January 2010, 05:21   #6
Member
 
Country: Belgium
Length: 5m +
Join Date: Jan 2008
Posts: 90
Quote:
Originally Posted by 9D280 View Post
Also if you can, try it with a different fuel tank - there may be some diesel contamination - that also produces white smoke.
hi, that's very interesting information - I indeed used such a green army tank that before was filled with diesel - I saw it was empty (maybe some layer at the bottom you can't get out, you know) - in that way I filled the fuel tank... but such a small amount on let's say 80l, can this cause the white smoke?
__________________
BarflyRIB is offline   Reply With Quote
Old 04 January 2010, 05:25   #7
Member
 
Country: Belgium
Length: 5m +
Join Date: Jan 2008
Posts: 90
Quote:
Originally Posted by 9D280 View Post
You got the needle valve. Easy to fix by bending the bits of metal slightly (assuming of course the needle isnlt gubbed.
in another topic I think, I read it can be normal that when the engine is fully trimmed out and you squeeze the bulb, the fuel drips away from the carb... I think I have to check again with the engine completely down
__________________
BarflyRIB is offline   Reply With Quote
Old 04 January 2010, 06:43   #8
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,611
The valve is closed by a float. They are usually arranged so they still float & close the valve even when trimmed fully up (to stop fuel leaks), but might also be worth checking it still floats!
__________________
9D280 is offline   Reply With Quote
Old 20 February 2010, 15:34   #9
Member
 
Country: Belgium
Length: 5m +
Join Date: Jan 2008
Posts: 90
today, beautiful day and want to go for a ride - new spark plugs in, new impeller and thermostat on cylinder 4 and the engine won't fire up

the primer bulb stays soft after pushing several times...

battery is good, starter engine gets round and also the flywheel - sometimes the top gear of the starter engine doesn't come off the flywheel when I stop the ignition... weird.

could there be an air leak somewhere?

what's the best way to start in this temps a 1996 mariner 150 2 stroke?
__________________
BarflyRIB is offline   Reply With Quote
Old 20 February 2010, 17:11   #10
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by BarflyRIB View Post
the primer bulb stays soft after pushing several times...
sounds like you need to deal with that issue then. Assuming their is fuel in the tank, is the pickup tube under the liquid (not fallen off), is the pipe air tight, are the one way valves in the bulb working (and its fitted the right way round), etc
__________________
Poly 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 03:24.


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