Yamaha Prime Start System

[smallribber]

My new to me Yamaha 75hp 2005 2 stroke seems to be now running very well. It is a sod to start however after not being used for a while. It has the Yamaha Prime start system with the extra fuel pump and wax plug activator device. It also has the manual over ride switch/lever. I think I may have an issue with the wax bead device.

I will first wait for a coldish day and try the manual override to see if I can confirm if the wax thing has the issue.

Any information about this system would be useful.

I have learnt that lifting the fast idle lever is not good with this system.

What was wrong with an old fashioned choke I know not

[Nos4r2]

Yeah,. the Yam 2 strokes don't need all that tech. Shame you haven't got a standard set of older carbs and just swap them.

You could try disabling the 'prime start' autochoke thingy completely and just using the manual setup as a matter of course (Not sure how you'd do that though)- I've always found Yam 2 strokes without it don't need more than about a second on choke and about 30% fast idle when absolutely stone cold anyway.

[A1an]

Originally Posted by smallribber

I have learnt that lifting the fast idle lever is not good with this system.

you “unchoke” it by lifting fast idle.