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Help! Need Experiences w/Older Lawn-Boys (1980 Utility) and OPTI-2 Oil

#1

L

Lawn-Boy Rocky

Folks,
As the title indicates, please help with your successful experiences with mix ratios of OPTI-2 in older Lawn-Boys. I'm getting mixed input from folks, including the OPTI-2 sales reps. My 43 year old manual and fuel tank stamping says:
ONE LAWN-BOY CAN OF OIL TO 2 GALLONS OF GAS.
or
8 OZ. OF NON-LAWN-BOY OIL TO 1 GALLON OF GAS.
So, about how much of my recently purchased OPTI-2 to a gallon of gas? Any thoughts? You know you want to help.
Thanks in advance,
Rocky


#2

B

bertsmobile1

Your original Lawn Boy ratios were for mixing with engine oil
Modern 2 stroke oils get mixed a lot thinner
In fact if you mix to the old ratios you usually get carbon build up around the exhaust port .


#3

L

Lawn-Boy Rocky

Bert,
Thanks, that's why I don't want to "experiment" with my mower.
I'm still looking for someone who has been down this ratio road before.
The manufacturer recommends only 1.3 oz/gallon which seems way too lean on oil.
Rocky


#4

S

slomo

Lawn-Boy Rocky said:
Bert,
Thanks, that's why I don't want to "experiment" with my mower.
I'm still looking for someone who has been down this ratio road before.
The manufacturer recommends only 1.3 oz/gallon which seems way too lean on oil.
Rocky
Click to expand...
The reason they say this and I am an owner of that product, is their 2-smoke oil is massively thick compared to other 2 smoke oils. I myself struggled with how little oil they want you to use. Then I thought about it. Shook the oil a bit. Poured it to use and noticed the syrup like consistency.

I called them on the phone to ask. They claim to have been in biz for like 30 or something years. Never had anyone with a locked up engine...... blah blah blah.......

So a double thick 2 smoke oil, once diluted with gas is fine. Shake well and pour. Runs fine in my trimmers and blowers.


#5

L

Lawn-Boy Rocky

slomo said:
The reason they say this and I am an owner of that product, is their 2-smoke oil is massively thick compared to other 2 smoke oils. I myself struggled with how little oil they want you to use. Then I thought about it. Shook the oil a bit. Poured it to use and noticed the syrup like consistency.

I called them on the phone to ask. They claim to have been in biz for like 30 or something years. Never had anyone with a locked up engine...... blah blah blah.......

So a double thick 2 smoke oil, once diluted with gas is fine. Shake well and pour. Runs fine in my trimmers and blowers.
Click to expand...
So Slomo,
Just curious,do you actually have what ratio you've used in your Lawn-Boy (mine is a 1980 model, i.e. not making use of more modern engine materials found in much newer trimmers and blowers)?
Rocky


#6

S

slomo

I don't have any lawn boys. Just my Maruyama trimmer and backpack blower that are 2 smokers.

Call the OPTI guys and ask your questions. They have a toll free number.

Remember today's oils are WAAAAAY better than when your mower came out. Don't need all that oil from days gone past anymore.


#7

R

Rivets

I use and recommend Opti-2 in all my 2-cycle engines without any problems. Buy it only in tubes for one gallon on ethanol fuel. I don’t own any Lawn Boys now, but do have customers who follow my advice with no problems.


#8

L

Lawn-Boy Rocky

slomo said:
I don't have any lawn boys. Just my Maruyama trimmer and backpack blower that are 2 smokers.

Call the OPTI guys and ask your questions. They have a toll free number.

Remember today's oils are WAAAAAY better than when your mower came out. Don't need all that oil from days gone past anymore.
Click to expand...
Slomo,
Thanks for the info.
Rocky


#9

L

Lawn-Boy Rocky

Rivets said:
I use and recommend Opti-2 in all my 2-cycle engines without any problems. Buy it only in tubes for one gallon on ethanol fuel. I don’t own any Lawn Boys now, but do have customers who follow my advice with no problems.
Click to expand...
Rivets,
Thanks for your input, I value your experience.
Rocky


#10

22R

22R

More oil = more smoke = more lubrication =long life
Less oil = Less Smoke = Less lube = Kaboom !

I usually go 2.6 or 7ox whatever those lil Stihl or Echo plastic bottles hold that say mix with 1 gallon of gas on my Lawnboys.....no issues


#11

L

Lawn-Boy Rocky

22R said:
More oil = more smoke = more lubrication =long life
Less oil = Less Smoke = Less lube = Kaboom !

I usually go 2.6 or 7ox whatever those lil Stihl or Echo plastic bottles hold that say mix with 1 gallon of gas on my Lawnboys.....no issues
Click to expand...
So, 2.5 oz/gal would be 50:1.
And, 2.7ox(?)/gal slightly less than 50:1.


#12

B

bertsmobile1

22R said:
More oil = more smoke = more lubrication =long life
Less oil = Less Smoke = Less lube = Kaboom !

I usually go 2.6 or 7ox whatever those lil Stihl or Echo plastic bottles hold that say mix with 1 gallon of gas on my Lawnboys.....no issues
Click to expand...
To an extent
You missed the last line
Too much oil = carbon build up+ piston & cylinder scoring = no compression

I have seen 50 times more 2 stokes where the owner ran too heavy a mix got a carbon build up on the exhaust port that broke away got stuck in the ring the gouged grand canals into the bore.

Not as big of a problem with cast iron bores but devistating to alloy ones
There are 2 types of oil mixes
The right ones & the wrong ones and wrong goes both ways


#13

22R

22R

bertsmobile1 said:
To an extent
You missed the last line
Too much oil = carbon build up+ piston & cylinder scoring = no compression

I have seen 50 times more 2 stokes where the owner ran too heavy a mix got a carbon build up on the exhaust port that broke away got stuck in the ring the gouged grand canals into the bore.

Not as big of a problem with cast iron bores but devistating to alloy ones
There are 2 types of oil mixes
The right ones & the wrong ones and wrong goes both ways
Click to expand...
Tell ya what you are probably technically correct but try this run the same 2 stroke engine of your choice for 30 mins one with a high ratio oil mix and the other with none and report your findings. I would do the high ratio one first if you want to complete the test.

22R


#14

S

slomo

22R said:
Tell ya what you are probably technically correct but try this run the same 2 stroke engine of your choice for 30 mins one with a high ratio oil mix and the other with none and report your findings. I would do the high ratio one first if you want to complete the test.

22R
Click to expand...
Don't know what you are trying to ooze out of this convo but the question has been answered already.


#15

22R

22R

Hey SloMo, not trying to ooze anything. I have a Lawnboy and OP wanted to know about oil mixture. I use the lil 2.7oz bottles you mix with a gal of gas ( read post right there) I think someone did not like the less oil /more oil part. Try it yourself if you want since you missed my correct answer the OP. report you results.


#16

Hammermechanicman

Hammermechanicman

Got a 30+ year old S21ZPM lawnboy. Ran the LB green can oil at recommend 32:1 for about 20 years. Last 10 or so different oils opti, stihl, red armor, at 50:1 with regular pump gas. All runs the same with no problems.





It's not the space shuttle.


#17

S

slomo

Hammermechanicman said:
It's not the space shuttle.
Click to expand...
Some thinks it is. LOL


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