1963 sea king-- omc?

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Old 03-26-08, 03:19 PM
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1963 sea king-- omc?

i have i believe a 1963 40 hp sea king mtr,mod #cg18805a and ser# 36x870617,can any one tell me what make the motor is,and the fuel to oil ratio,the boat mtr says 24to1 of #30 oil to 6 gal gas,would that hold true to the new tcw3 syn 2 cycle oil as well.thanks for any help
 
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Old 03-26-08, 03:58 PM
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Those old engines need lots of lubrication to keep running smoothly... Keep the oil/gas ratio at 24:1
 
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Old 03-27-08, 05:46 AM
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does it matter if i use tcw3 syn oil or straight 30 oil,thanks for the info
 
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Old 03-27-08, 07:00 AM
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I, for one, get leery of using sythetics on older engines. Valid concern?? Don't know to be honest. I'd stick with 2 stroke oil (not 30 wt) designed for 2 stroke mixing (plenty of brands still out there).
 
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Old 03-28-08, 04:22 AM
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I would consult with an oil represenative, these new oils are much better than the oils that were in use when these engines came out, and if I were to make a decision I would go with the new oils at maybe a 32:1 ratio and keep an eye on the spark plug colors. You may be able to go to 40:1 or higher.
 
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