But you can construct one out of a couple nails banged into a peice of wood. There's little adjustable testers you can get from auto tool stores for a couple dollars which work very well. Yours is definitely too old.There's many ways to test spark. It's best to replace them every season or two, notwithstanding use since they go bad just sitting around. Forget about muffs - the type that fit your engine are very hard to find.Don't worry too much about impeller damage now you'll have to replace it anyway. That is the bolted joint that is 3 or 4" above the horizantal plate above the propeller. Mark42 is absolutely correct - you do not want to start this engine unless it's in a bucket of water filled up to the seam between the lower unit and the mid-section. If it's getting the better of you, take a break and relax.Īh, it looks like I was getting a bit ahead of where we're at then. When working properly, you will be able to draw a spark 3/8" long from each lead.Any history on this engine? Was it just stuck a bit? If so, when turning the engine with the spark plugs out now is there any binding?One other thing: wrenching an outboard is an exercise in paitence. So it's entirely possible to have spark on one but not the other.
Don't start the engine up like this though.The ignition system is completely independant and both cylinders are independant from each other. You can go a step further and disconnect/isolate the two small black wires that come down from the armature plate up underneath the flywheel. How often do you hear those words when it comes to outboards? For now, just make sure that the two small black wires that come out of the engine are not connected to anything, especially each other. If the compression is good, and the lower unit seems fine (check the oil for water/metal chunks), repairs can be made fairly inexpensively.Don't sweat the lack of spark. This will let us know if the engine has anything seriously wrong with it, since you'll soon be deciding whether to fix it or give up on it. Do you happen to have a compression tester? If not, borrow or obtain one.
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