how much oil

zeber

Cadet
Joined
Jan 3, 2010
Messages
12
in my 1984 25 hp johnson how much oil should i use in fuel i run 50:1 now i do most or my boating in winter duck hunting , very cold water. i usualy have a heavy loaded boat , 16 foot river jon any help thanks
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: how much oil

50:1 is correct, make sure the tstat is working. they motor needs to get up to temperature.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,036
Re: how much oil

16 oz of TCW-III Two Cycle oil mixed with 6 gal of gasoline gives the proper 50::1 mix. If you have a 3-1/2 gal tank, mix 8 oz oil with 3 gal gas.
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: how much oil

If your running a heavy load be sure you prop so the motor operates within its rpm range.You'll need a tach to figure out your rpm.
The tinytach is reasonable and easy to install. One for your motor is about $40 and will fit any 2cyl. 2 stroke.Could save you premature repair problems.
 
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