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Old 17 May 2009, 11:25   #1
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TCW3 or TCW2 for an aircooled outboard?

I have just bought an old (mid 70's) 5 HP Crescent air cooled outboard to go with my Zodiac 131 to see if I can get it to plane. (Just a bit of fun as I am new to inflatables - usually in displacement hull fishing boats.)

Anyway back to the main question: Will this outboard be OK running on TCW3 oil or must it be TCW2? Any advice would be appreciated. Thanks!
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Old 17 May 2009, 13:09   #2
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Originally Posted by jgtec View Post
I have just bought an old (mid 70's) 5 HP Crescent air cooled outboard to go with my Zodiac 131 to see if I can get it to plane. (Just a bit of fun as I am new to inflatables - usually in displacement hull fishing boats.)

Anyway back to the main question: Will this outboard be OK running on TCW3 oil or must it be TCW2? Any advice would be appreciated. Thanks!
Nah, needs TCW2. TCW3 can't take the temps of an aircooled motor.

You'll find that Crescent closer to a 4hp than 5hp. I used to have one-they are an old Gardner lawnmower powerhead bolted to a shaft.Noisy as hell but mine was very reliable though.
Incidentally, don't run it out of water. It DOES have a water pump on it-used to cool the leg. The leg will get quite hot if the pump is dead.
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Old 17 May 2009, 18:23   #3
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Thanks!

Is there a TCW2 especially for marine engines or can I literally just use lawn mower oil as I already have some of that?

Thanks for the info about needing water to cool the leg, as I has considered taking off the prop and testing on a frame rather than the recycling bin full of water!

If it's only 4HP what are my chances of getting my S131 to plane - anyone got an opinion?
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Old 17 May 2009, 18:33   #4
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You can use lawnmower oil.

I'd be surprised if it did make it plane, though you might be lucky in dead flat calm.
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Old 17 May 2009, 19:12   #5
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It's lucky I'm not a speed freak!

I'll just have to choose my day carefully then!! Cheers!!

I think I'll have to look for a cheap, more powerful engine in need of a little TLC and put in the hours on that and look to do some planing next season!!
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