Re: 1991 johnson hard start
hi all i was going to post the same type of issue my jonny 90hp 1987 runs all day but is a real bugger to start, i dont fully understand what pushing the ignition key does, and how long i push it for???
thanks
tim
When you pump the bulb, it fills the carb bowls with fuel with some pressure. When you push in the key, it "primes" the cylinders. It opens a valve which allows the fuel from the carb bowls to flow directly into the cylinders to aid starting. This function is instead of a choke. There is a little red lever on the engine itself that manually controls that primer valve if for some reason the key doesn't activate it (which you can hear - push in the key, that valve should click).
One thing about 2 strokes be they 5 hp or 250 hp, they tend to have starting quirks. In my experience, you kind of need to learn what works best for your engine, and stick to that routine. It might be a little different in terms of how long to hold the key in, etc.
My V6 requires a solid pumped up bulb, a good 8 full seconds of holding the key in before starting ... then it starts fine. If I don't hold it in for the full 8 seconds, say stop at 5 or 6, it makes it a bear to start. Once it's started and warmed up, it starts like a charm. If it cools down, I just do the entire procedure again - including making sure the bulb is pumped up hard.
One way it was explained to me (which may or may not be true, but it makes sense as a mental image anyway): The bigger the engine, the more time it takes to get the fuel to the cylinders to prime them.