Fuel to Oil Ratio

H

HNield

Recruit
Joined
Feb 24, 2006
Messages
3
Hi, my father-in-law has just bought a new engine for his boat but is unsure on the best fuel to oil ratio to use. It's a Johnson Seahorse 4, the model number is J4BRCTA and we think it was made in either Belgium or the USA. I know it's not a lot of information but can anyone help? Thanks :confused:
 
WillyBWright

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: Fuel to Oil Ratio

Welcome to iboats. :) <br /><br />1983. They were advertising 100:1 around about then, but went back to 50:1 after a year or two. So 50:1.
 
M

MCM

Lieutenant Junior Grade
Joined
Jun 1, 2005
Messages
1,201
Re: Fuel to Oil Ratio

Welcome to iboats NHield,<br /><br />50:1 fuel/oil ratio is recommended dosage,<br /><br />J= Johnson<br />4= Horsepower<br />B= Belgium<br />R= Rope start<br />CT= 1983<br />A= Doesn't mean anynthing to us, just the manufacturer
 
B

budsbud66

Petty Officer 2nd Class
Joined
Feb 25, 2006
Messages
105
Re: Fuel to Oil Ratio

Were all Evinrudes rated for 100:1 ??? <br /><br />i heard the reason why the changed it was, because in storage the motors were more prone to siezing because of the lack of oil left in the cylinders..<br />is thier any truth behind this?????
 
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