74 johnson problems

[donduthie]

engine starts fine and engages in foward/reverse but when you throttle up the motor only goes 1/4 speed. In netreul it rev up like it should. seems to be getting good spark and gas. suspect lower unit problems. any ideas?

 

[JB]

Re: 74 johnson problems

Moving to JohnnyRude Troubles. (sigh)

 

[Darian F.]

Re: 74 johnson problems

Try checking your timing. also look and see if your choke is not open allowing engine to breathe to get some rpm's <br />Try new spark plugs, Are the "old" plugs soaked with fuel?<br />keep posting

 

[DJ]

Re: 74 johnson problems

duthie,<br /><br />2-stroke outboards will rev up just fine, with no load, on half or less of thier cylinders.<br /><br />My suspiscion is that you are losing a cylinder, under heavy loads.<br /><br />Buy a cheap spark tester at a local auto parts store and check for spark, on both cylinders, when you problem occurs.