Servicing a Merc 50hp

[JSP]

On the subject of oil, why do you have to use 2 stroke oil that says it's for use in outboards. What's the difference between that and normal motorbike 2 stroke?

[Nos4r2]

Originally Posted by JSP

On the subject of oil, why do you have to use 2 stroke oil that says it's for use in outboards. What's the difference between that and normal motorbike 2 stroke?

Give me a ring and I'll explain it all to you

[JSP]

Thanks mate, I will do as soon as I find somewhere to live. Sleeping in a boat on a marina at the moment. I am a Gipo

[Poly]

Originally Posted by JSP

On the subject of oil, why do you have to use 2 stroke oil that says it's for use in outboards. What's the difference between that and normal motorbike 2 stroke?

to cut a long story short (at least to my simplistic understanding) outboards are water cooled and so run cooler. chainsaws, motorbikes etc are air cooled so generally hotter. the oil is designed for the different temperatures. I know someone who has used bike 2 stroke in his jetski for 5 years, but his plugs do seem to get coked/oiled up more than normal.

[9D280]

Aye,

When I bought my current project - I mean RIb - it came with a "free" 5l bottle of unbranded motrorbike 2- stroke oil. When I changed the plugs I got soot out the business end of the spark plugs! A few days of runing with new pugs & Yamlube & it definetly improved as the soot deposits burned off.

Alas that engine has now gone to a higher plane (well, OK, the bottom end is now going to keep a simialr machine running). The rigging of the new motor starts tonight.....