73 Rude 50hp just stops

[tashasdaddy]

model 50373R carbs rebuilt 9 months ago is missing on top cylinder, compressiom 160 on top, bottom 158. been thru joe reeves setting carb. need help.have swapped coils top still missing, swapped plugs still missing, new plugs still misssing.

 

[Joe Reeves]

Re: 73 Rude 50hp just stops

Remove spark plugs. Rig up a spark tester whereas you can set a 7/16" gap. At cranking speed, the spark should jump that gap with a strong blue lightning like flame.<br /><br />If it does, I'd suspect that the carburetors need cleaning thoroughly. There's a fixed brass fixed high speed jet located in the bottom center of each carburetor float chamber. If those jets should be slightly clogged/restricted, that would cause a high rpm problem. The adjustments you mentioned pertain to the lower rpms and idle.<br /><br />In one area, you say the engine stops. In another, you say it's missing. Which is it?

 

[tashasdaddy]

Re: 73 Rude 50hp just stops

it would run fine for about 10min wot and just stop like you cut it off, restart and go again and cut off. pumping bulb doesn't help. now its missing and doing the same thing. i plan to pull the flywheel as soon as the weather permits.

 

[Joe Reeves]

Re: 73 Rude 50hp just stops

Remove the black/yellow wire from the ignition switch. If that cures what appears to be an ignition failure, replace the ignition switch.<br /><br />Note... with that wire disconnected, you will not be able to shut the engine down with the key switch.

 

[reeldutch]

Re: 73 Rude 50hp just stops

when it happens check for spark,<br />then swap the wires from pp to coil.<br />dont run the motor only check for spark<br />let us know what happens.<br /><br />i suspect a bad powerpack.

 

[tashasdaddy]

Re: 73 Rude 50hp just stops

researching power pack brp #0581137,,other site says replace with 18-5755. is this correct?

 

[MCM]

Re: 73 Rude 50hp just stops

0581137 was superceded to #0581397, 18-5755 is the correct Sierra repalcement p/pack