8243AE F00000

[dwiemer]

Is the oil/gas ratio 16 or 32 to one? Also, anyone have an owner's manual for this mower? Thanks in advance.

 

[Rivets]

Most of the older LawnBoy's used a 32/1 mix. I would recommend you purchase one of the new synthetic oils (such as Opti 2) which can be use in any 2-cycle engine, no matter the fuel/oil ratio. You won't have to worry. Owners manual for these older unit are hard to find. Maybe you'll get lucky and someone has one they will photocopy for you.

 

[Phototone]

Take the muffler off and look into the exhaust ports, rotate the crankshaft until you can see the piston rings. Count the rings. a 3-ring piston requires 16-1 ratio, a 2-ring piston requires 32-1. Please don't go below 32-1 ratio even with new oils, as you are courting disaster.

 

[Rivets]

Been running the synthetic oils for the past 6 years (both at the shop and personal use) and have yet to have any type of fuel ratio failure. Gone from 4 gas cans to 1. With the number of two cycle units I've seen using this, I think I would have seen at least one problem if I was courting disaster. Everything from the $1.98 Weedeater to $600 chainsaws.

 

[fabricgator]

Take the muffler off and look into the exhaust ports, rotate the crankshaft until you can see the piston rings. Count the rings. a 3-ring piston requires 16-1 ratio, a 2-ring piston requires 32-1. Please don't go below 32-1 ratio even with new oils, as you are courting disaster.

Good info there folks...
Thanks Phototone.

 

[robinb66]

I pretty much have always ran 32:1 on everything I own both the Lawnboy and Homelite 30cc string trimmer although the trimmer calls for 40:1 I really haven't really had any real problems using 32:1 and with the advances in lubrication technology in the last 10 years probably won't!!