Go Back   RIBnet Forums > RIB talk > Engines & props
Reload this Page Oil/petrol mix ratio

Join RIBnet Today
Reply
Page 1 of 3 1 23
 
Thread Tools Search this Thread
 
Old 18 February 2010, 16:59   #1
Member
 
Country: Greece
Town: Chania
Boat name: Patricia
Make: Ribtic
Length: 5m +
Engine: Outboard Petrol 135
Join Date: Dec 2009
Posts: 7
Oil/petrol mix ratio
Can anyone tell me the correct oil/petrol mix ratio for a late 1980's Mercury 4HP aux. back-up engine?
Also correct spark-plug gap for the above engine?

Steve
Stephen Myatt is offline   Reply With Quote
Old 18 February 2010, 19:37   #2
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
Quote:
Originally Posted by Stephen Myatt View Post
Can anyone tell me the correct oil/petrol mix ratio for a late 1980's Mercury 4HP aux. back-up engine?
Also correct spark-plug gap for the above engine?

Steve
50:1. Not sure on the plug gap-what plug is it?
__________________
Need spares,consoles,consumables,hire,training or even a new boat?
Please click HERE and HERE and support our Trade Members.
Nos4r2 is offline   Reply With Quote
Old 19 February 2010, 18:25   #3
Member
 
Country: Greece
Town: Chania
Boat name: Patricia
Make: Ribtic
Length: 5m +
Engine: Outboard Petrol 135
Join Date: Dec 2009
Posts: 7
Plug Gap
Quote:
Originally Posted by Nos4r2 View Post
50:1. Not sure on the plug gap-what plug is it?
It's a NGK B7 HS
Stephen Myatt is offline   Reply With Quote
Old 22 February 2010, 17:40   #4
RIBnet supporter
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Undecided....
Length: 6m +
Engine: 200HP Optimax
MMSI: N/A
Join Date: Jun 2002
Posts: 2,733
Quote:
Originally Posted by Stephen Myatt View Post
It's a NGK B7 HS
0.7mm (0.27" in old money)
Jizm is offline   Reply With Quote
Old 22 February 2010, 17:58   #5
RIBnet admin team
 
Polwart's Avatar
 
Country: UK - Scotland
Town: Linlithgow
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 5,855
Quote:
Originally Posted by Jizm View Post
0.7mm (0.27" in old money)
Do you work for nasa?
Polwart is offline   Reply With Quote
Old 22 February 2010, 21:54   #6
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 4,997
Quote:
Originally Posted by Polwart View Post
Do you work for nasa?
Someone lost a decimal point!
chewy is offline   Reply With Quote
Old 23 February 2010, 16:07   #7
RIBnet supporter
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Undecided....
Length: 6m +
Engine: 200HP Optimax
MMSI: N/A
Join Date: Jun 2002
Posts: 2,733
Quote:
Originally Posted by Jizm View Post
0.7mm (0.27" in old money)
sorry, 0.027"
yes I missed a decimal place....
Jizm is offline   Reply With Quote
Old 23 February 2010, 16:08   #8
RIBnet supporter
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Undecided....
Length: 6m +
Engine: 200HP Optimax
MMSI: N/A
Join Date: Jun 2002
Posts: 2,733
Quote:
Originally Posted by Polwart View Post
Do you work for nasa?
depends what nasa stands for...
Jizm is offline   Reply With Quote
Old 23 February 2010, 16:50   #9
RIBnet admin team
 
Polwart's Avatar
 
Country: UK - Scotland
Town: Linlithgow
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 5,855
Quote:
Originally Posted by Jizm View Post
depends what nasa stands for...
North American Space Agency? they has some issues with metric-imperial conversion... which cost them a space craft and $100M
Polwart is offline   Reply With Quote
Old 23 February 2010, 18:54   #10
Member
 
Bigmuz7's Avatar
 
Country: UK - Scotland
Town: Glasgow
Boat name: *dunno yet*
Make: Tornado
Length: 5m +
Engine: Yama ..yeeha 75
Join Date: Feb 2006
Posts: 3,670
Quote:
Originally Posted by Polwart View Post
North American Space Agency? they has some issues with metric-imperial conversion... which cost them a space craft and $100M
Ah .. I didnt know that was the root cause ..
Bigmuz7 is offline   Reply With Quote
Reply
Page 1 of 3 1 23

« Mariner 60HP Bigfoot - what's it worth? | Top | Which Prop do you think please? »
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



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT. The time now is 04:23.

Contact Us - RIBnet - Archive - Community Rules - Terms of Service - Privacy - Top

RIB News Delivered to your Email!

Stay up-to-date with RIB news in your inbox!

unsusbcribe at anytime with one click

Close [X]