Reply
 
Thread Tools Search this Thread
 
Old 05 June 2008, 17:47   #11
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
it could be running seriously rich - does it have a sticking autochoke or anything?
__________________

__________________
codprawn is offline   Reply With Quote
Old 05 June 2008, 19:06   #12
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
hi thanks...... what is a sticking autochoke?
__________________

__________________
ali_seton is offline   Reply With Quote
Old 05 June 2008, 19:10   #13
Member
 
Country: UK - England
Town: Midlands
Make: Nautique
Length: 6m +
Engine: PCM 5.7l
Join Date: Oct 2003
Posts: 1,082
£28 for 5 hours running...

Approx 20lts, so 4lts an hour
Sounds pretty normal to me.
__________________
simmons0 is offline   Reply With Quote
Old 05 June 2008, 19:16   #14
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by ali_seton View Post
hi thanks...... what is a sticking autochoke?
does it have a manual choke or an automatic one?
__________________
codprawn is offline   Reply With Quote
Old 05 June 2008, 19:18   #15
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
Quote:
Originally Posted by ali_seton View Post
Hi,

please could you help..... i have a 1990 or a 1998(im not sure) 40hp Mariner electric start and trim engine. The fuel usage is completely apauling like £28 in 5hrs of going 4 knots!!! THIS CANT BE RIGHT!!! Please can someone advise on what they think about sorting it out so its more economic!!

Thanks,

Alex
If it's a very used engine, make a compression test if OK, are you using the correct gapped spark plug type ? If worned or too fouled, change for new ones, if OK, would think in changing complete carb accesories for new ones, with time and use high speed orifice and jets tend to wider their gas hole passages comsumming more gasoline as before. Check also for any gas leaks in gas filter, pump, hoses, etc. Don't know if your engine is a Tohatsu or Yamaha manufacture rebadged to Mariner brand, Tohatsu manufacture uses rack & piñon throttle arm photo 1, Yamaha uses cable drive throttle arm photo 2.

If it were a Tohatsu the factory consumtion parameters are:

Full Throttle Engine RPM Range : 5200-5800 rpm
Full Throttle Engine Comsumtion (WOT) 4.49 Gal/Hour (17 Ltr/Hour) 3.78 Ltr to Gallon

Does not state if tested on a factory test tank, or on a boat with calm waters.

Happy Boating
Attached Thumbnails
Click image for larger version

Name:	Tohatsu Type.JPG
Views:	91
Size:	99.5 KB
ID:	35213   Click image for larger version

Name:	Yamaha Type.JPG
Views:	88
Size:	119.6 KB
ID:	35214  
__________________
Locozodiac is offline   Reply With Quote
Old 06 June 2008, 14:59   #16
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
thanks... the choke is on the controls..... you push the key in to choke
__________________
ali_seton is offline   Reply With Quote
Old 06 June 2008, 17:25   #17
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
it could be the choke is sticking or just the carb needs adjusting.
__________________
codprawn is offline   Reply With Quote
Old 07 June 2008, 04:16   #18
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
thanks.... how can i check and adjust those?????
__________________
ali_seton is offline   Reply With Quote
Old 07 June 2008, 04:22   #19
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
Get the engine serviced. Not only will it be tested for the optimum fuel efficiency, but they will check other items like water pressure, change the gearbox oil etc to provide you with a safer and a longer term cheaper boating experience.

I don't think that you'll ever acheive the sort of economy that you're looking for, welcome to the world of digging holes and throwing money away
__________________
Andy

Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
Hightower is offline   Reply With Quote
Old 07 June 2008, 12:52   #20
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
Quote:
Originally Posted by Hightower View Post
Get the engine serviced. Not only will it be tested for the optimum fuel efficiency, but they will check other items like water pressure, change the gearbox oil etc to provide you with a safer and a longer term cheaper boating experience.

I don't think that you'll ever acheive the sort of economy that you're looking for, welcome to the world of digging holes and throwing money away
Hightower is right, get the engine serviced by a qualified reputed shop for best engine performance, or opt for a less HP engine 25/30. Outboards are fuel eaters compared to motorcycles and cars for the same travelled distance. Part of the divertimento is to spend huge amounts of money, a lot worse with fuel prices now a days, definitely not a cheapy sport, but fun anyway.

Happy Boating
__________________

__________________
Locozodiac 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 12:21.


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