1970 80 hp outboard!!!

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ivanator

Cadet
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Sep 7, 2011
Messages
10
what oil ratio do I use for a 1970 80 hp outboard? How many oz. of oil do I use per gallon of gas?
 
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2dbit

Petty Officer 3rd Class
Joined
Jun 29, 2010
Messages
75
Re: 1970 80 hp outboard!!!

http://www.csgnetwork.com/oilfuelcalc.html

Pretty great calculator if you don't want to have to think about it too hard. My impression has been that modern 2 stroke oils are formulated so that a 50:1 ratio is more than enough oil to keep your engine running long. Some oils are good to 100:1 but, between a slightly fouled plug and a destroyed motor...I'll take the slightly fouled plug. (just whatever you do, don't get into what the best 2 stroke oil you should use is...)
 
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Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,148
Re: 1970 80 hp outboard!!!

Run it 50::1. One US pint of TCW-III Two cycle oil (any brand) to 6 US Gallons of regular unleaded gasoline
 
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ivanator

Cadet
Joined
Sep 7, 2011
Messages
10
Re: 1970 80 hp outboard!!!

ok thank you guys i am going to try this out i know the motor has been sitting for at least 3 years.
is there any kind of proses i should take before starting it? thanks to all

and no i wont even ask what oil to use.... lol i know where that would lead......
 
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