Stall when applying load

[UGS]

I have read threads which seem to have similar charateristics to my problem but not exact. Wanted to get some opinions. <br /><br />1974 Merc 140HP I/O<br /><br />Boat will run fine for a while and then will periodically sputter, and choke like its not getting fuel and then stall, when load is applied. if I wait a few minuets it starts right up and may not do it agin for a while or at all that day. <br /><br />Points are old, plugs and look good. -<br /><br />If you recomend the point replacement does anyone have the correct gap? i beleive it is .022.<br /><br /><br />thanks,

 

[jeff13601]

Re: Stall when applying load

That is the gap but you need to set the dwell. All of this is on a tag on the starboard side of the motor. They should be replaced every year, along with the rest of the tune up. Chances are the points are glazed over and a tuneup will solve your problem. Points, plugs, condenser, rotor, plugs and wires, fuel filters and water seperator

 

[UGS]

Re: Stall when applying load

Thanks, looked for the tag and only found oil specs. Could anyone send me the dwell and quick procedure for adjusting? I don't see an external screw on the distributor.<br /><br />You also mentioned a water seperator, only see the fuel filter in the black metal "cone" shaped holder.<br /><br />Thanks.

 

[UGS]

Re: Stall when applying load

Problem is now -- engine will not start.<br /><br />Have replaced points, cap and rotor, ran for about two hours stalled and would not start.<br /><br />Feels and sounds like a fuel delivery problem. Have also replaced fuel filter after this happened. after cranking a few times i pulled the filter and very little fuel came out of the housing.<br /><br />Pulled supply tube from tank to check screen, was clean. Also made sure the the needle value at the top of the supply tube moved freely. <br /><br />Put it all back together and it started and ran at high idle for about five minutes until I turned the engine off. After sitting a couple of hours it would not start again. <br /><br />Beginning to believe it may be the fuel pump. <br /><br />Is there a test I can run to confirm?? Any thoughts or suggestions??<br /><br />1974 Merc 140 I/O Engine Serial 3681922.<br /><br />Thanks