carb setting

[ekkj3635]

have a v4al15e i think it is 1963 75 h.p. johnson what is the setting on the high and low for the jets could you send me a diagam of this the motor runs and idles but loads up when you start to go

 

[tashasdaddy]

Re: carb setting

See the TOP SECRET FILE top of this forum. sounds like an linc n sinc is in order also.

 

[Chris1956]

Re: carb setting

You might PM Joe Reeves for the initial setting for the low and high speed needles.

you might check your fuel pump diaghram for leaks. A leak there would load up the crankcase with fuel.

 

[ekkj3635]

Re: carb setting

linc n sinc is done how and I would check diagram on fuel system but need one to do so,so if their is someone who has one please send me it please

 

[Chris1956]

Re: carb setting

Fuel system is pretty simple. Premixed fuel runs from quick connect fitting on lower cowling to fuel pump "in" fitting. Fuel then exits fuel pump "out" fitting and goes to carb. The third hose on the fuel pump is the pulse line from the crankcase.

Clean the sediment bowl, check the pulse line for fuel. If the pulse line has fuel, the fuel pump needs rebuild. A dealer should still have a rebuild kit.

 

[ekkj3635]

Re: carb setting

I checked bowl it is clean it is getting enough fuel but is an adjustment for the high end I have it start good and idle but it is loading up when you go should i be checking spark and if so what is the easy way to do so

 

[Chris1956]

Re: carb setting

if you have adjustable high speed jets, I think the initial setting was 5/8 turn out. I am really not sure about that. You might PM Joe Reeves.

You need to set the high speed jets at high speed. Lift the adjustment pointer straight up and turn it around so it sits on the lip of the carb.

Have someone drive the boat at full speed (be real careful) and adjust each needle until you get clean smooth and fast running. Now drop the adjustment pointer over the needles and turn it a bit to see if you have the optimum high speed fuel/air mix.

 

[ekkj3635]

Re: carb setting/fuel mix

Re: carb setting/fuel mix

it doesnt have any adjustable high jets. I was told fuel mix is 50:1 is that correct or is it too rich is that the reason it running so rich please help!