Hi all,
I have a 1985 Evinrude 9.9hp short shaft two stroke here. I believe its model number starts in either E10 or 10E. There is a sticker on the powerhead cover next to the fuel line connection which shows a few cartoon icons of a gas can, and oil drop, showing a ratio of 100:1 for the fuelil.
My questions are:
1) Isn't this thing too old to be using a 100:1 oil ratio? I thought outboards that were 20+ years old all used 50:1?
2) Is there any possibility that somebody put this sticker on the motor some time in the last 25 years without knowing what ratio it really needs? The sticker has a clear background and is located very close to the fuel line connection. It seems to me like something that was factory original but I am not certain.
I know that using 50:1 in a 100:1 motor can result in clogging which requires disassembly and cleaning, but that it won't generally harm the engine long term. However I've read horror stories of using 100:1 in motors that need 50:1 which will cause permanent damage. Please help me avoid screwing up my motor...
I have a 1985 Evinrude 9.9hp short shaft two stroke here. I believe its model number starts in either E10 or 10E. There is a sticker on the powerhead cover next to the fuel line connection which shows a few cartoon icons of a gas can, and oil drop, showing a ratio of 100:1 for the fuelil.
My questions are:
1) Isn't this thing too old to be using a 100:1 oil ratio? I thought outboards that were 20+ years old all used 50:1?
2) Is there any possibility that somebody put this sticker on the motor some time in the last 25 years without knowing what ratio it really needs? The sticker has a clear background and is located very close to the fuel line connection. It seems to me like something that was factory original but I am not certain.
I know that using 50:1 in a 100:1 motor can result in clogging which requires disassembly and cleaning, but that it won't generally harm the engine long term. However I've read horror stories of using 100:1 in motors that need 50:1 which will cause permanent damage. Please help me avoid screwing up my motor...