Quick confirm: oil mix

[andrewss]

Just bought a boat with a 1986 merc 60, the guy I bought it from seemed very knowledgeable and gave me a thorough rundown on the boat, motor, and any minor foibles the old girl has. Motor runs great after a good warm up. But he told me the oil mix is 40:1, this seemed off to me but he assured that's what it is. Everything I can find specs 50:1.
So... 50:1?
I just bought a jug of Mystik 'Premium Plus' Syn Blend JT4 TSW3 and will be running 91 octane.

Thanks

 

[Alumarine]

You're right, it's 50:1.
Some people think more is better but in this case it's not.
Is there no autolube on that or has it been disconnected?
Not sure what years they started with autolube.

 

[The Force power]

Just bought a boat with a 1986 merc 60, the guy I bought it from seemed very knowledgeable and gave me a thorough rundown on the boat, motor, and any minor foibles the old girl has. Motor runs great after a good warm up. But he told me the oil mix is 40:1, this seemed off to me but he assured that's what it is. Everything I can find specs 50:1.
So... 50:1?
I just bought a jug of Mystik 'Premium Plus' Syn Blend JT4 TSW3 and will be running 91 octane.

Thanks

50:1 is the mix ratio
When you finish the jug synblend just switch to TC-W3 oil from wallymart
or pick one (lol);
There are roughly 600 blends certified by NMMA as TCW3 compliant. The only thing guaranteed to be unique about these blends is the NMMA certification/registration number assigned to the blend. That number is used for administrative purposes and affirms only that the blend was submitted to TCW3 compliance testing. It does not guarantee that the blend is unique or different from other blends.

 

[andrewss]

@marc c Awesome thanks for confirming. Don't have auto lube on this motor.

@The Force power Is the synblend oil not advised just because of price? Everything in Canada is expensive haha, and it's the only one of two that I could find in a 1 gal jug, the other being QuickSilver and it was $10 more. 1qt bottles are about $12-17ea.

 

[racerone]

Oil / mix confusion AGAIN.------The motor will run just fine with 40:1 mix.-------Parts and pieces inside a 2 stroke need oil to keep parts separated.------And yes at 40:1 the motor will be happy and live a little longer.----I run my 1967 Lawnboy mower at 16:1 , it runs like top with lots of power still.

 

[The Force power]

@The Force power Is the synblend oil not advised just because of price? Everything in Canada is expensive haha, and it's the only one of two that I could find in a 1 gal jug, the other being QuickSilver and it was $10 more. 1qt bottles are about $12-17ea.

Not "necessary" as any TC-W3 is sufficient BUT use whatever you're confirmable with (including the mix ratio)

 

[andrewss]

thanks guys. i had it out on a local river last weekend to make sure boat and motor were solid, and it ran great - topped out at 24mph which was a bit slower than I'd hoped but it's old and the boat is heavy

 

[The Force power]

thanks guys. i had it out on a local river last weekend to make sure boat and motor were solid, and it ran great - topped out at 24mph which was a bit slower than I'd hoped but it's old and the boat is heavy

Canadian Tire has the tcw-3 oil on sale at times

 

[dingbat]

That number is used for administrative purposes and affirms only that the blend was submitted to TCW3 compliance testing. It does not guarantee that the blend is unique or different from other blends.

Or... that it did anything other that met minimum performance standards which are a joke.....

Pass Fail Criteria: To be considered acceptable for certification in TC-W3®, a candidate oil must pass the following criteria:

1) Compression Loss: No cylinder compression loss of equal to or greater than 20 psi is allowed within the 100 hours of test operation, including the 100 hour compression check.

2) Reported piston scuffing, scoring or wiping may not exceed 15% circumstantially on each side of the pistons.

3) Reported piston scuffing, scoring or wiping may not exceed 20% “total area coverage” per piston side.

4) Reported ring wiping may not exceed 5% of the circumference of the ring face of any ring.

 

[The Force power]

Or... that it did anything other that met minimum performance standards which are a joke.....

Pass Fail Criteria: To be considered acceptable for certification in TC-W3®, a candidate oil must pass the following criteria:

1) Compression Loss: No cylinder compression loss of equal to or greater than 20 psi is allowed within the 100 hours of test operation, including the 100 hour compression check.

2) Reported piston scuffing, scoring or wiping may not exceed 15% circumstantially on each side of the pistons.

3) Reported piston scuffing, scoring or wiping may not exceed 20% “total area coverage” per piston side.

4) Reported ring wiping may not exceed 5% of the circumference of the ring face of any ring.

Interesting, thank you
I'm sure that one is not like the other, but I was hoping to avoid a mass argument of what is "the better one"
That's why I said; use whatever you're comfortable with.
Personally I don't care really, as long as is does the job. lol

 

[racerone]

Using the wrong oil , cheap oil, wrong mix is not something that manifests itself in a few days.-----Some day you will see a gray haired fisherman running a 60 year old motor and running like new.-----Ask that fellow what oil he uses and what mix !

 

[The Force power]

Using the wrong oil , cheap oil, wrong mix is not something that manifests itself in a few days.-----Some day you will see a gray haired fisherman running a 60 year old motor and running like new.-----Ask that fellow what oil he uses and what mix !

I guess that will be you, that I'll meet.
looking forward to that

 

[racerone]

I see folks buying new lawn mowers every few years,-----I know it is cheaper more convenient to buy a new one than to pay and wait for repairs.-----I run a 1967 Lawnboy 2 stroke mower at 16:1 has lots of power.----I know how these fine machines work.-----Use oil salvaged from VRO outboard tanks when I get those with scrap / for parts outboards.------I have seen many posts here.------Talked to numerous people over the years.-----2 stroke oil , mixture ratios , lubrication is not well understood !

 

[The Force power]

I see folks buying new lawn mowers every few years,-----I know it is cheaper more convenient to buy a new one than to pay and wait for repairs.-----I run a 1967 Lawnboy 2 stroke mower at 16:1 has lots of power.----I know how these fine machines work.-----Use oil salvaged from VRO outboard tanks when I get those with scrap / for parts outboards.------I have seen many posts here.------Talked to numerous people over the years.-----2 stroke oil , mixture ratios , lubrication is not well understood !

I'm not disputing what you're saying.
About the Lawnboy mower however; I too have one ('90s) and run it 32:1 and have lots of compression left.
I think it's just because they're really good motors and not your average $150 "crappy tire special"

 

[racerone]

You have to wonder what the reasoning is behind 32:1 mix on these.------Was it a better machine ?------Better oil ?-----Or public does not like smoke?----Or with all that smoke it must be an inferior piece of machinery.----Board room decision to retain market share as the public thinks it is now a better built machine able to run at 32:1 ? ----To go from 16:1 to 32:1 does not sound very scientific in my opinion !!

 

[The Force power]

You have to wonder what the reasoning is behind 32:1 mix on these.------Was it a better machine ?------Better oil ?-----Or public does not like smoke?----Or with all that smoke it must be an inferior piece of machinery.----Board room decision to retain market share as the public thinks it is now a better built machine able to run at 32:1 ? ----To go from 16:1 to 32:1 does not sound very scientific in my opinion !!

-Nobody likes smoke, for sure!
-Oils did improve over the years
-Better engine; maybe
Maybe after extensive research....they discovered that a mixture of 32:1 is sufficient, who knows?? but a 16:1 ratio may actually be better in other aspects/long term for them.
The same would go for the Mercs. 50:1 OR 40:1

 

[racerone]

In my opinion the sudden change from 16:1 to 32:1 on Lawnboy and 24:1 to 50:1 on outboards was a BOARDROOM decision.-------Suddenly in 1964 the Johnson outboards could run on 50:1 instead of 24:1 in 1963.-----If you look at parts books you will see that the 1963 models had the same parts as the 1964 models.

 

[GA_Boater]

In my opinion the sudden change from 16:1 to 32:1 on Lawnboy and 24:1 to 50:1 on outboards was a BOARDROOM decision.-------Suddenly in 1964 the Johnson outboards could run on 50:1 instead of 24:1 in 1963.-----If you look at parts books you will see that the 1963 models had the same parts as the 1964 models.

It may be that the Johnson engineers ran tests with varying oil and gas ratios discovered that 50:1 afforded the same protection to moving parts as 24:1 with the benefit of saving customers money on oil with less consumption and less spark plug fouling at low speeds.

 

[dingbat]

Suddenly in 1964 the Johnson outboards could run on 50:1 instead of 24:1 in 1963.

Here is a technical paper that addresses the issue given at the Annual SAE meeting June 1963. Looking for the full paper

Paper is focused on reducing 2 stroke emissions to compete with the up and coming 4 stroke motors

Lots of papers on 2 stroke oil development to support leaner mix ratios in the same time period.

FlexPaper AdaptiveUI JSP Example

FWIW...... my 1990 2 stroke EZ-GO golf cart runs at 125:1

 

[racerone]

The public believes that a motor that can run at 50:1 is a " better built " motor than a 24:1 model.-----Therefor the factory supplied the public with same !!