I have a 1997 McCulloch MAC 2818 string trimmer.
It has been incredibly reliable. A few years ago, I replaced the spark plug and the fuel line was rotted, so replaced it.
I think two years ago it finally got a carb kit as it wouldn't run right. This spring I put a new air cleaner element in.
I always use E0 gas (90 octane).
I bought a bottle of MMO to put some in my old Explorer. I thought that I would give my MAC a "treat" so I put an ounce in the gallon of gas/oil mix. It run like garbage. It was as if it was very rich. I had to keep it revved up or it would die. Finally, after a few minutes of trimming, it just quit, and I couldn't get it re-started.
At first, I thought maybe my old MAC finally bit the dust. After I thought for a minute, I remembered putting the MMO in. I really didn't think that was it, but that would be easy to try. I dumped all of the fuel out and mixed up a new gallon with just E0 and oil. After just a couple minutes of clearing the MMO laden fuel out of the lines and carb, it is back to running great again. Ran it for probably a half hour straight; purred like a kitten.
So much for the "treat".
I did also put about an ounce per gallon in my four stroke mowers and they don't seem to mind it at all.
It has been incredibly reliable. A few years ago, I replaced the spark plug and the fuel line was rotted, so replaced it.
I think two years ago it finally got a carb kit as it wouldn't run right. This spring I put a new air cleaner element in.
I always use E0 gas (90 octane).
I bought a bottle of MMO to put some in my old Explorer. I thought that I would give my MAC a "treat" so I put an ounce in the gallon of gas/oil mix. It run like garbage. It was as if it was very rich. I had to keep it revved up or it would die. Finally, after a few minutes of trimming, it just quit, and I couldn't get it re-started.
At first, I thought maybe my old MAC finally bit the dust. After I thought for a minute, I remembered putting the MMO in. I really didn't think that was it, but that would be easy to try. I dumped all of the fuel out and mixed up a new gallon with just E0 and oil. After just a couple minutes of clearing the MMO laden fuel out of the lines and carb, it is back to running great again. Ran it for probably a half hour straight; purred like a kitten.
So much for the "treat".
I did also put about an ounce per gallon in my four stroke mowers and they don't seem to mind it at all.