Re: 1962 10hp Johnson-Low compresion
You can time it two ways. One is to open the points to the maximum by turning the cam. You'll notice this happens when the key on the tapered part points toward the point's rubbing block. This should be set to .020".<br />The other way involves a timing light or a meter. If you look at the armature plate (where the coils sit) you'll see two marks about 1/4" apart. When one of the coresponding marks on the flywheel lines up between the two marks, the points should open, the spark spark, the timing light flashes, and the resistance across the points increases ever so slightly.<br /><br />I suspect the reason you can't get the powerhead off is because the driveshaft is frozen (rusted) to the crankshaft in the engine. Try to remove the lower unit first. The shift shaft disconnect is behind the window on the exhaust leg.<br /><br />Don't rering without honing the cylinders lightly. This step alone will probably pick you up 10psi. Like mmcpeck, I think it should run at 70psi. A good test to see if the carb is pluged is to put some premixed gas in a spray bottle, and spray it down the carb's throat.<br /><br />If you're trying to rering this without a manual, you're flying blind. There's plenty of critical torques and measurements you need to know. Sometimes, our local libraries have a manual you can borrow. Otherwise, look to ebay, or iboats.
