Starting an older 100 HP Johnson

[Huskie]

Since I picked up this rebuilt 100HP Johnson, I've not been completely happy with it staring. The tech at the shop said to push the key in for 10 sec. then start it, should that be necessary all of the time or only on a cold start. Should you turn the key to the on position before you choke it or doesn't that matter.

[CAMAN]

I don't see what good it will do to choke the motor for 10 seconds before starting. Choking the motor just closes off the butterfly, forcing the motor to suck in more fuel and less air, and that only happens if the motor is turning over.

And yes, the key should be in the 'ON' position for the choke to work.

[Surface Tension]

What year is the outboard?

Choking is a generic term. Instead of a butterfly choke you could have a fuel enrichment activated by a solenoid.

Yes you have to turn the key to the on position when "Choking".

After the engine starts you might have to bump the key periodically till the engine warms up.

Once the engine is warm, has run for a while you should not have to choke it to start it. If you do then you have issues with lack of fuel.

[Huskie]

Early 1990's. I think its a 1991. 4 carbs, 2 on top of the other 2 as I was told, gets gas in all 4 before you start it by pushing in the key "choke". Just stating what advice the tech gave me.

[boatfixer]

Frank is correct, it is a solenoid primer. 1 push = 1 shot of gas into a nipple near the carb flange. holding it will do no more than that. Push it again and more 1 shot of gas.