That depends on its age, most modern motors take fuel and mix oil separately and mix it for you, you only need to fill the mix oil reservoir.
Model number QD-19 is a 1958 Johnson 10 hp, nice motor, take care of it.
a Honda takes premix and can take 4 strike motor oil for tranny oil
You have to take out the cylinder, how low is it, what is the difference
The required spark plug for a 50 hp outboard engine would depend on the make, and year model of the engine.
As long as you can secure the motor to something that will stand up to the engine's power, and you can get water into it so it won't melt, you can safely run an outboard off the boat. Unfortunately, the "securing the engine" part will hold you back - 115-horse engines will flip over any garbage can, oil drum, wading pool etc., you might come up with. Your best bet would be to take the outboard to a boat dealer and have it tank tested.
The JW-10 model, 3 hp Johnson outboard consumes very little fuel compared to larger engines. Generally, the onboard tank will provide enough fuel for a few hours run time. Take some extra fuel with you on the first couple of outings until you know how much run time you have on a tank of fuel.
take it to a lawnmower shop they do them all the time....its way easier that way trust me.....
My 2004 Suzuki DF70 uses NGK BPR6ES plugs.
If the seals between oil and fuel has been damaged then mixing will happen, take the motor to a qualified repairer
A Johnson outboard, model number MS39, would be a 1939 model, 1.1 hp. As for the value of this engine, I suspect it would garner some collecter interest. I have not seen this model up for sale in several years, so I'm not certain of current value. You have a nice engine there, take care of it.
A 1957 Evinrude 18 hp weighs 85 pounds, so I would assume the Johnson 18 hp would be about the same, give or take a few pounds.
All outboard gas primers - take it off blow threw gas tank side (from gas tank) and there should be no restriction, you should be able to blow threw with ease completely open all the way threw. Blow through the motor side of the primer bulb and it should be impossible to do so as it has one or two check valves which open when you draw fuel from your fuel tank and close upon releasing bulb keeping the fuel up in to the motor or fuel bowl........