Re: JOhson 40 hp 69 electramatic
The fuel/oil mixture on that engine is 50/1, one (1) pint of 50/1 oil to six (6) gallons of gasoline.<br /><br />As above, check the compression. Remove the spark plugs and rig up a spark tester. Also as above, the spark on that model should jump a 1/4" gap with a strong blue lightning like flame... a real SNAP!<br /><br />The throttle butterfly...... Notice on the top portion of the powerhead on the starboard side, there is a steel rod leading from the vertical throttle arm to the carburetor roller assembly. Also notice that there is a brass sleeve on that rod with a set screw.<br /><br />Now, with the engine NOT RUNNING, spin the prop and put it into forward gear. Now move the armature plate under the flywheel (the plate with the coils, points etc on it) to its full spark advance position..... but only to that full spark advance position, no further as we do not want to engage the carburetor movement.<br /><br />Now, loosen that set screw in the brass connector that's on that steel rod. Use a finger to gently press on the end of that steel rod to eliminate any play but do not press hard enough to engage the carburetor. Slide that brass collar back up against the vertivcal throttle arm's clevis and tighten that set screw.<br /><br />At that setting, when you advance the throttle further, the spring you see at the top of the vertical throttle arm, will alow the vertical throttle arm to move further and since the brass collar is right against it at that point, that forces the throttle butterfly to open fully.<br /><br />Let us know what you find. Your english is quite good..... my french is non existent.
