I read on a post to use a 45:1 mix for better Lubrication?

[camawelander]

I have a 89 force 35hp -
i currently run it 50:1 as the manual states-

I recently read that it may be a good idea to run a richer mix 45:1 for better lubrication in the engine. This post stated that he "tuned" the motor to run with this mix.

1.) Is this a good practice?

2.) If so, how would one "tune" the motor to burn the extra oil?

Thanks

 

[tashasdaddy]

Re: I read on a post to use a 45:1 mix for better Lubrication?

bunk. 50:1, the extra will create a smokey exhaust.

 

[guy74]

Re: I read on a post to use a 45:1 mix for better Lubrication?

I agree with TD, no need for the extra oil. Most people who use portable tanks mix 1 pint oil to 6 gallons of gas (48:1) anyway. If you use the chart on the bottle of 3oz to 1gal thats 43:1 mix. If you still want to run more oil, to tune for it you need larger main jets, the oil takes up space and doesn't count toward the air fuel mix. They run lean with extra oil, makes for a rougH idle. Goodluck with whatever you decide to do.

 

[F_R]

Re: I read on a post to use a 45:1 mix for better Lubrication?

Extra oil is wasteful and more damaging to the environment. Most people are trying to figure out if it's safe to use less oil not more. (often not).

 

[jay_merrill]

Re: I read on a post to use a 45:1 mix for better Lubrication?

I agree with all of the others - 50:1 is fine. This is sort of like folks who insist on running premium gasoline in a car that is designed for 87 octane. Also, bear in mind that modern semi-sythetic and synthetic oils are already lubricating you engine much better than the original oil ever did.

 

[ziemann]

Re: I read on a post to use a 45:1 mix for better Lubrication?

Then there is the REALLY obvious stuff when running too much oil:

- Increasingly fouled plugs
- Carbon build up and the increasing potential of sticking a ring (thus needing to rebuild a cylinder)
- More smoke
- more black soot on the motor and boat
- Increased cost
- Poor running quality/ idle

Stick to 50:1- your Force motor is a very simple engine and any TCW3 oil running at 50:1 will be great in that motor.

Good luck!

 

[Bigprairie1]

Re: I read on a post to use a 45:1 mix for better Lubrication?

I had been wondering about this myself and as a result had been adding a bit more oil to the mix thinking it offered extra protection on some level.
However given the responses here I think I will dial back to the 50:1 ratio as recommended for my Force which, thus far, has been a tough and reliable motor...and I would kind of like to keep it that way.
All good.
BP

 

[noelm]

Re: I read on a post to use a 45:1 mix for better Lubrication?

on that information, then why not run 25:1 that will give you twice as good Lubrication, (joking) but as mentioned 50:1 is all your Motor needs, anymore and a whole new bunch of problems will appear.

 

[LORDY611]

Re: I read on a post to use a 45:1 mix for better Lubrication?

I'd bet that the motor manufacturers have already allowed for boaters being knuckleheads and the 50:1 already is padded a bit. In other words, if mixing oil and gas were an exact science every time, the motors could probably do fine with an even leaner ratio, but they probably decided that 50:1 is safe and protective, and they could get the motors to run well on that blend. Just my guess...

 

[F_R]

Re: I read on a post to use a 45:1 mix for better Lubrication?

That is true. I was told by an Evinrude engineer way back in '64 when they came out with the 50:1 that they knew their motors would run on 100:1 if they could trust people to mix it accurately. Eventually they did specify 100:1 and found it to be a big mistake and retracted the spec. Seems that they ran on it OK but rusted between runnings because of lack of an oil film on the parts.