Yamaha 4HP 2-stroke

[bccjbn]

A very simple question - so simple that I feel foolish asking it.

Is the fuel switch turned to the right or the left to open it?

 

[VicS]

Different models have different fuel taps.

does this help

If it is fairly recent you may be able to veiw an owners manual at http://www.yamaha-motor.com/outboard/service/viewmanuals/outboard_manuals.aspx

 

[barrow_matt]

Mine is the same as this: http://www.ybw.com/forums/showthread.php?t=278979

I used it today and i'm pretty certain it was clockwise to fuel on

 

[bccjbn]

Thanks for the suggestions.

I've inherited this old engine on a tender. It's too old for the manual to appear on the Yamaha website. I'm told it runs well, but the symbols for the fuel cock are worn away. It has a knob that turns through 90 degrees. That knob, the cut-out button and the choke knob are in a straight line.

 

[VicS]

You could always disconnect a hose to determine which is on and off.

Sounds like a model produced around the eighties or early nineties

Fuel tap knob on the left as you look at it?

 

[bccjbn]

That's right, Vic, fuel knob on the left.

 

[tyce]

When looking at the valve turning it anti clockwise 90 degrees takes it to the external tank line out, and 180 degrees anti clockwise opens the internal tank

 

[bccjbn]

Thanks, but we must be talking about different models. This one doesn't have a feed from an external tank and the knob will only turn through 90 degrees.

 

[Lakesailor]

Seemples.
Like Vic says.
Take the cover off. Disconnect the fuel pipe from wherever it goes to (not from the tap, you'll bust it) lower the end of the pipe so that fuel can flow out and turn the tap. In one position fuel will flow. In the other it stops.
Needs fuel in the tank.

 

[Heckler]

Seemples.
Like Vic says.
Take the cover off. Disconnect the fuel pipe from wherever it goes to (not from the tap, you'll bust it) lower the end of the pipe so that fuel can flow out and turn the tap. In one position fuel will flow. In the other it stops.
Needs fuel in the tank.

Some good rules of thumb, taught to me as an apprentice, look at the pipe, if the "cock" is in line with the pipe it is open. Turn clockwise to close something, when looking at it from the operating side. As an aside, taught by the same fitter to me, always fully open a wheel valve and then shut it half a turn. If a wheel valve is open all the way then if you go to open it, not knowing if it is open or not, you can force it and break it. If it is half a turn from open then it will be "loose" and you know it is open.
Stu

 

[Fantasie 19]

Mine is the same as this: http://www.ybw.com/forums/showthread.php?t=278979

I used it today and i'm pretty certain it was clockwise to fuel on

+1

 

[bccjbn]

Thanks for the responses.
Used Vic's suggestion over the weekend.
Turning it clockwise opens the valve.
Problem solved - runs well.