Will often ignite during the exhaust stroke when the plug is easy to fire. Since the Cushman engine fires every rotation of the crankĪnd the compression stroke occurs every other rotation, the unspent gas charge Under compression so if it tends to cut out when you accelerate It takes much more voltage to jump the gap when the spark plug is Is either a weak magneto coil, a fouled spark plug, or oxidized or dirty points. Is very hard to start and seems to fire or backfire a lot, the most likely cause Will cause the engine to be very hard to start and may cause it to cut out as It will not jump the gap on your regular plug satisfactorily when the engine is Your magneto does not have sufficient voltage to jump the gap on the test plug
Tires for cushman truckster full#
Find a location out of full sun, connect the spark plug wire to the test
It has a much wider gap than your regular plug.
Special plug has a clip welded to the grounded side that you can attach to anyĬonvenient grounded object. If my Magneto is OK? Obtain a test spark plug like the Tool 4 sold by Cushman dealers. Many of the hopped up engines work best with a colder plug. If you have excessive fouling problems you can go to a higher heat range Cushman gave various recommendations for gaps over the years, Be sure not to put a tapered seat plug in your non-tapered seat head or You should make your ownĭetermination as to the suitability of any of these alternate plugs. Other plugs often recommended for the tapered seat head are the Bosch 6200,Ĭhampion 4011, NGK WR5, Champion 870 and Autolite 46. A Champion RF14Y or RF14YC is anĪcceptable substitute and is readily available, but it is a resistor plug. With tapered seats used a Champion F14Y, which is no longer made but someĬushman dealers may still have a few in stock. Suitable substitute for either is the Champion D-16 and this is also the correct plug forĪll later engines that do not have a tapered seat.
Tires for cushman truckster manual#
However, the Cushman manual for the model 32 and 34 published in 1943 states Should I use? Most references state that a Champion #7 spark plug was used for 1948 and earlier scooters. Also be veryĬareful with the mallet because you do not want to loose a helper or break off a It because over tightening the nut may cause the flywheel to crack. If you do it this way you just have to use your best The original Cushman method is to strike the end of theīreaker bar lightly with the hammer to tighten the nut a little more. Other torques the nut to about 60 Ft/Lbs. Way to tighten it the rest of the way is to purchase a strap wrench that can Torque it to about 25 foot-pounds or more this way. Ready to reinstall the flywheel first tighten the nut as far as you can with theīreaker bar while your helper holds the flywheel by its perimeter. Be very careful when you do this because if you strike a fin Very tight on the shaft before trying again. Not come loose with the first strike be sure that the knockoff tool is still Now strike the knockoff tool smartly and squarely with a large ball peen hammer and the flywheel should pop Second person to put a little outward force it on the flywheel. Tool lightly while tightening it to be sure it is seated as far down as it will Remove the flywheel without it or try to substitute a nut for the tool you may damage the crankshaft. The knockoff tool isĭesigned to prevent any damage to the crankshaft threads. Screw a knockoff tool on the end of the crankshaft threads, part number 112015įor the OMC engine or 809315 for the Cast Iron engine. After the nut and lock washer have been removed, The shaft from turning by jamming any part of the flywheel or clutch with aĬrowbar or similar object. Strike the end of the breaker bar with a wood mallet. While someone else holds the flywheel by it’s perimeter carefully The best way to remove the nut is to use a ½ or larger breaker bar and aġ-1/16 socket that is deep enough to clear the fins. It is going to take considerably more than that to get it If this nut was installed to the old Cushman specification it was Before doing this you must remove the flywheel nut and lock washer. You find information contained in the technical and historic articles.Ī Cushman Husky or Silver Eagle engine the flywheel is removed by striking theĮnd of the crankshaft with a ball peen hammer. The Site Search is very powerful and can help The Site Search link can be used to find every occurrence of any Flywheel Spark Plug Magneto Brakes Electrical Front End Oil Tires Gasoline Driveįind the information you need on this page be sure to check the Hints & Tips
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