I have a Yamaha 8MSHC outboard motor. how do I tell what type of fuel it uses? gas? mixed oil and gas?

Question

I am getting mixed messages. straight gas, oil/gas mixture with varying mix ratios.... very confusing.

Answer 1

If it has a seperate tank for engine oil,it's 4 stroke, i.e petrol only. If not use a pre mix.Usually 40 or 50 to 1ratio nowadays. Might say the correct ratio on the fuel cap. Or,you could look it up on Yamahas web site.

Answer 2

Depending on the model year, your engine could be either a two stroke or  four stroke.

An easy way to be certain is to look for an engine oil dipstick on the top of the motor. If it has one, it's a four-stroke and straight gas is the ticket.

http://www.yamaha-motor.com/outboard/ser...

Hope this helps