Reply
 
Thread Tools Search this Thread
 
Old 13 January 2004, 06:24   #11
Member
 
Country: UK - England
Town: Brittany/Portsmouth
Boat name: Merlin
Make: Solent 6.5
Length: 6m +
Engine: 200
MMSI: soon !
Join Date: Jul 2003
Posts: 5,451
rogue,

Is the small differance in fuel consumption only at 3/4 cruise speed. At wot is the differance alot more, doesn't the modern 2 stroke act like a normal 2 stroke and suck in tons of fuel ?? I remember someone saying that to me (i think).

Also how much oil (cost) over 3000 miles


paul
__________________

__________________
Happy New Resolutions!!! : RIBbing for the craic!!!
The Jackeens is offline   Reply With Quote
Old 13 January 2004, 06:45   #12
DJL
Member
 
Country: UK - England
Make: Ribcraft 6.5
Length: 6m +
Engine: Suzuki DF175TG
Join Date: Apr 2002
Posts: 929
Stuart,

Don't forget we are talking about the mid range here and therefore don't have the choice of opti/HPDI etc yet.

Its not just saving money on fuel its the extended range that comes with it. I save about 12 on a normal day, plus I get another >40nmi range out of my tanks.

It may be different further up the power scale but I would never ever buy a 2-stroke in the 40/60HP range again. Plus the 2-strokes are still noisy and smelly, which every technology you get.
__________________

__________________
DJL is offline   Reply With Quote
Old 13 January 2004, 11:18   #13
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Hi Daniel and Paul.

Hmmm 2 strrokes are noisy and smelly....agreed but enough of the good points.

I agree that medium 2 strokes engines are better being four strokes, but the new technology is getting down into the 90 hp region now. your point about extended range is noted however what if you had a 150 4 stroke which guzzled more than a 150 Opti (which is actually quite likely)

Paul The oil consumption is a good point and for 3000 miles
you would need 25.2 litres of oil and that's about 120 quid. Although the 3000 miles is a generous amount of mileage.
but say you needed a litre every 100 miles then thats about 150 .

Paul I'd be very interested to know how many miles you tooz did this year as you are never off the water and that would give us a good rule of thumb.

I push my engines quite hard and I think all engines consume more when the throttle opens up. However the Opti is stunning on fuel. when we went to Yarmouth and back that night we burned about 40 litres. which I think is very reasonable.

I am not attacking Daniels engine I think he bought the best engine around at that size. I also think your is an excellent engine, but they have a 75 Opti on the way
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 13 January 2004, 11:21   #14
Member
 
Country: UK
Make: Ribcraft
Length: 4.8m
Engine: Mercury F60 EFI
Join Date: Dec 2003
Posts: 89
I think the new E-tecs give the midrange 2strokes the direct injection technology of larger engines. However, the F60 is EFI anyway (not quite direct injection, but better than carb).

Also an often overlooked point I feel is that fuel tanks on boats (taking the midrange 4stroke engines) are never large. This is where a 4stroke would be preferable as you can go a whole days boating without having to fill up half way through! This was certainly one of the factors that made me choose a 4 stroke. After all, 60hp is 60hp whether its two or four stroke.

Prop selection is surely more vital when it comes to performance so why not have the right prop for performance and have the 4stroke for a uninterrupted day on the water?

Robert
__________________
Robert1 is offline   Reply With Quote
Old 13 January 2004, 11:48   #15
Member
 
Country: UK - Scotland
Town: Oban
Boat name: RIB Tickle
Make: Humber Assault
Length: 5.3m
Engine: Yamaha 60ETO,Tohatsu 3.5
Join Date: Dec 2003
Posts: 371
I have never run a 4 stroke so have no experience of them, however I only use around 1lt per mile at WOT with the boat fully loaded with 4 folk, 4 sets of dive kit and 8 cylinders.
In the future I may consider a 4 stroke mainly for the lack of noise but I like the ability to strip and maintain the 2 stroke, something I am being told is not practicable with all the black boxes on the current 4 strokes.
__________________
http://www.argylldiving.btinternet.co.uk
Rupert Bear is offline   Reply With Quote
Old 14 January 2004, 07:16   #16
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
To be honest ,and not wishing to compromising my memebrship of the 2 stroke supporters club, I must say that the new technology outboards are as conplex as a fourstroke in terms of electronics and injection rails. etc
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 14 January 2004, 07:24   #17
Member
 
Country: UK - England
Town: Chelmsford/Anglesey
Make: Avon SR/RibLite 3.1m
Length: 4m +
Engine: Honda 30hp/Yam 8hp
Join Date: Jul 2003
Posts: 970
You've had a busy week on the forum Stuart with all these engine threads going on! Keep it up, your advice and experience is always well worth listening to!
__________________
Phil Davies is offline   Reply With Quote
Old 14 January 2004, 10:09   #18
Member
 
Country: UK - Scotland
Town: Oban
Boat name: RIB Tickle
Make: Humber Assault
Length: 5.3m
Engine: Yamaha 60ETO,Tohatsu 3.5
Join Date: Dec 2003
Posts: 371
Quote:
Originally posted by Rogue Wave
To be honest ,and not wishing to compromising my memebrship of the 2 stroke supporters club, I must say that the new technology outboards are as conplex as a fourstroke in terms of electronics and injection rails. etc
My outboard has one black box for the EMS, one of the advantages of a, how do I say it, more elderly motor
Not being able to strip and maintain myself is not my cup of tea.
__________________
http://www.argylldiving.btinternet.co.uk
Rupert Bear is offline   Reply With Quote
Old 14 January 2004, 13:32   #19
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Agreed Mr Bear,

I feel a lot happier servicing and maintaining the Yamaha 3 pot 70 than any of the other ones. In fact it's the only one I haven't broken lately
__________________

__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave 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 16:37.


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