Reply
 
Thread Tools Search this Thread
 
Old 06 August 2008, 03:04   #1
Member
 
Country: Australia
Town: Australia
Boat name: Independent (Indy)
Make: Avon SR6
Length: 6m +
Engine: Twin 90hp E-Tec 2016
Join Date: Oct 2007
Posts: 59
Twin 90hp Yamys v 90hp E-Tec Need Advise

Hi All,

I have a 6m 1997 SeaRider fitted with 2 yamahas. I am about to remotor the boat and would like advise on whether to stick with 2 Yamaha 90hp 2008's, or roll over to twin 90hp E-TEC's. The price difference is going to be about 6k between the two motor brands.

The 2stroke Yamaha's come in just over 40kg lighter than the E-tecs. My boat has the original 97 model Yamaha 90's so I know how the boat handles with those donks, and given, not much has changed in the last 11 years with those engines.

I am de-rigging and probally change the single 200+ litre tanks to two seperate tanks - 1 for each motor.

Open to suggestions - Fors / Againsts.

Importantly does anyone have serious fuel consumption figures between the Yamy 2 stroke and the E-Tec.

I do like the idea of an e-tec starting petty much first time, and I like the idea of the Yamaha Built like a brick shithouse for reliability.

Regards and Thanks in advance.
__________________

__________________
mr_sav is offline   Reply With Quote
Old 06 August 2008, 14:50   #2
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
I have an etec 90 and love it but if fuel cost wasn't a major factor i would like the idea of the simple low tech yam 2 stroke that i could self service easily
__________________

__________________
ian parkes is offline   Reply With Quote
Old 06 August 2008, 16:20   #3
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Etec 90s !

Can't help with the choice, but I know what life is like with twin Etec 90's.
They start every time, first time - at four years old.
They burn less than 0.75L/Nm at 3100rpm, so less than 1.5L/Nm cruising on twins.
One will plane my boat at 20Kts - with the other dead leg in the water
They have a kick like a mule
As for servicing, technically they need serviced every three years or 300hrs, and are self winterising. In practise, I'd want them checked more often, impellers etc....
The oil is pricey, but they hardly use any at cruising/trolling speeds.
They'll have to prise mine from my cold dead hands, etc.....

PM me if I you want any more info...
__________________
willk is offline   Reply With Quote
Old 06 August 2008, 18:26   #4
Member
 
Country: Australia
Town: Australia
Boat name: Independent (Indy)
Make: Avon SR6
Length: 6m +
Engine: Twin 90hp E-Tec 2016
Join Date: Oct 2007
Posts: 59
Cheers Willk's - does anyone have Yamaha Stats

Thanks for that. Useful information.

I have had issues with leakages etc with my tank, So I have not got decent l/nm figures. Hence, I am de-rigging to attend to under-floor matters and re-motor whilst I am at it.

It is good to hear from some-one running the Donks rather than the sales - reps.

Ta.
__________________
mr_sav is offline   Reply With Quote
Old 07 August 2008, 06:42   #5
Member
 
Country: UK - England
Town: Margate / Ramsgate
Boat name: Ballistic
Make: Ballistic
Length: 7m +
Engine: Yam HPDI 250
Join Date: Feb 2002
Posts: 2,835
sorry to throw a cat amongst the sea gulls, but... have you considered 4 stroke, and why did you discount, they seam to be getting lighter?

bear in mind i make this comment without researching weights

as a die hard 2 stroke / DI (call it opti, E-Tec whatever) fan, i am almost converted now.

no seperate oil, same or better reliability / starting as a modern direct injection 2 stroke, and SO QUIET
__________________
Daniel is offline   Reply With Quote
Old 07 August 2008, 08:51   #6
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by Daniel View Post
no seperate oil, same or better reliability / starting as a modern direct injection 2 stroke, and SO QUIET
and loads of torque at low revs and longer service intervals....
__________________
willk is offline   Reply With Quote
Old 07 August 2008, 08:53   #7
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by mr_sav View Post
I have had issues with leakages etc with my tank, So I have not got decent l/nm figures.
betcha they use more!
__________________
willk is offline   Reply With Quote
Old 10 August 2008, 17:03   #8
Member
 
Country: Australia
Town: Australia
Boat name: Independent (Indy)
Make: Avon SR6
Length: 6m +
Engine: Twin 90hp E-Tec 2016
Join Date: Oct 2007
Posts: 59
2x Yamaha 90 2/s v E-Tec 90 Weight on SEARIDER 6m

All,

Thanks for Your Input. - I have struck a deal re: pricing for going down the twin 90 E-tec.

Both Donks collectively will come in about 44kg heavier than the Yamaha 2 Stroke.

Regarding SeaRider 97 Model, I can not find any reference to Transom Weight.

I don't expect there to be an issue, however, does anyone know the published weight for the 6m Searider Transom Weight.

What are peoples view on the extra weight?;

Regards,
__________________
mr_sav is offline   Reply With Quote
Old 10 August 2008, 19:07   #9
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
I guess you will save wieght by carrying less spare fuel
__________________

__________________
ian parkes 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 15:08.


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