Chraftsman 18hp. twin fuel problem

Don't know them well (actually, at all :) ), but a couple of general ideas -- sure there isn't a crack in the vacuum line leaking? Ends are notorious for developing same -- if have a little extra line, I'd cut off length that's on the fitting on each end and try just as an easy thing to do...

What about a leaking gasket(s) on the intake side? Any chance of an air leak there? The carb cleaner spray test while it's running is good for finding leaks although may not help much on that side since it's all fuel, supposedly. Although if it's in the vacuum path, could help...

Would need to know the engine and model number to try to find parts diagrams to see how they're actually built to get farther or more specific...

On the side of the motor, there is a cover that's about one inch wide, and three inches up and down. It's held on with two bolts, you'll need 1/4 or 5/16 nut driver. This cover exposes the ends of the valves (you will see two coil springs). This cover is also a check valve. Every time the piston goes "down", this valve releases a little bit of air. Soak the cover in gasoline or kerosine for awhile, dry it out, and see if that helps. They get full of grease and junk.

Nothing like a gasket *placed incorrectly* in the fuel pump repair.?

I get nervous when I have parts left over in a carb rebuild. :-)

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

Thanks for the info , I'll check the cover also . It is getting some air but it doesn't seem like very much to me . Rick

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I have disasembled the pump already . Just to be sure , I checked to make sure I didn't have the gasket reversed and that all the springs are in place. Rick

Rick wrote in news:1181234538.528546.153290 @p77g2000hsh.googlegroups.com:

It's pretty simple but maybe the problem: have you checked that the gas tank vent isn't plugged?

Yes the vent is in the cap , I tried it with the cap off also. Rick

make sure that pulse line to the pump is tight on both ends sir

Any idea where the plate would be ? I have looked the engine over and checked the parts schematic and can't find it. Rick

You guys may not be talking about the same motor.