Outboard oil ratio question

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Outboard oil ratio question

Postby Brent » Fri Jul 29, 2005 9:01 pm

I have a 1969 Evenrude 4 horse motor I use on my beloved old Grumman canoe for both duck hunting and fishing.

The motor has a lot of years on it but still runs really well.

It calls for 1/50 ratio on the oil mix, but this weekend I took the advise of an older gentleman I trust and ran 1/32.

It ran great and I think started even easier than before.

His feeling was there was no need to keep running the 1/50 on a motor this old and that I would be fine with a lower ratio.

Does this sound okay to all of you?

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Postby donell67 » Fri Jul 29, 2005 9:54 pm

i wouldnt recommend it. it will probly wear out pretty quick on that low a ratio.50/1 ratio is for a reason. even though its an old motor it will last even longer on the 50/1.
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Postby ol' yeller » Fri Jul 29, 2005 10:35 pm

Actually, the 32:1 ratio is mixing more oil to the gas than 50:1.

Brent, if it's running better then by all means mix it 32:1. The only drawback to running it that rich is you have a greater chance of fouling the plugs. Just make sure you carry an extra set of plugs and a plug wrench in case it craps out on you. Keep on keepin' on. :thumbsup:
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Postby donell67 » Fri Jul 29, 2005 10:57 pm

oops thought it was mixing less . sorry
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Postby Greg Wile » Sat Jul 30, 2005 5:57 am

I have 2 Ted Williams 7.5 hp out boards and they call for the 32:1 mix. The motor is made by Tecumseh. The 32:1 ratio is 4 oz of oil to 1 gal. of gas. I am about to buy an old 2.5 hp Evenrude to use for most of my fishing /hunting as I tend to go places inaccessible to vehicles hauling larger boats.
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Postby Brent » Sat Jul 30, 2005 6:34 am

I'm terrible with math and all that (English teacher, can't help it) and thought that 1:32 was less oil than the 1:50 I had been using- shockingly moronic of me now that I think about it.

I guess I'll go back to the 1:50 the motor has been used to for over 30 years.

Thanks for the responses.

Brent

Does anyone make a device that makes for easier measuring so I don't get the ratio screwed up (as I do from time to time)?
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Postby ol' yeller » Sat Jul 30, 2005 7:45 am

Brent, if your motor is running better at 32:1 then run it at that. Just do like I mentioned and carry an extra set of plugs as backup. It won't cause any damage to your motor. It's always better to have too much oil than not enough.

I bought an oil measuring bottle at Wal-Mart back around Christmas for a buddy of mine who hates trying to figure out what ratio he needs to mix. It was only a couple of dollars and was a clear bottle with just about every ratio you could ever think of printed on the side of it.

Boy am I glad my last 3 motors have oil injection. I don't think very well at 3:30 am. :laughing:
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Postby donell67 » Sat Jul 30, 2005 4:50 pm

yes, oil injection is nice.
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Postby greenster » Sun Jul 31, 2005 8:23 am

I think 1/32 is like 4oz per gallon Right?
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Postby Quackcephus » Sun Jul 31, 2005 11:22 am

What ol' yeller said. :thumbsup:
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Postby Gooseboy » Wed Aug 03, 2005 12:44 pm

the reason i bought a 4 stroke.
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mixing device

Postby marsh1buster » Wed Aug 03, 2005 9:09 pm

Go to walmart, in their boating/hunting dept. they sell a bottle with several diff. gas to oil mixture markings on it. sure makes things easy @ 4 in the morning headin' to the blind.
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Postby Brent » Fri Aug 05, 2005 6:14 pm

Hey everyone, thank for the input.

I got one of those bottles at WalMart, violating my own boycott (they built the one in my town on my favorite after work upland spot AND I hate all the Chinese crap...but I digress). The bottle will be really helpful. Thanks again.

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