I bought a 120 last fall, and couldn't get it going. I installed a new fuel/water separator, lines, and a used fuel pump that I found on ebay. It started immediately, and I let it run in the driveway for about ten minutes. I shut it off and restarted it a half dozen times, just to make sure everything was working the way it should. Two weeks later, I got my first chance to put the boat on the water and test it. The motor cranked fine, but wouldn't fire. Not too long after that, the weather got cold and it was time to cover the boat and give up.
Now, I finally have good weather and I started working on the motor again today. The first thing I realized was that there was about 10 gallons of three year old gas in the tank, that I had diluted with fresh gas last fall. So I drained the tank and refilled it with some fresh ethanol free. I tried the key and got the same thing as last fall, cranking but no fire.
I changed the spark plugs and poured a little gas in the bowl. The motor started hard, but eventually fired. It ran for about 5 minutes and shut off. It didn't sputter out like it was running out of fuel. It just stopped instantly. I tried again and it stated easy, but only lasted two minutes. I repeated this a handful more times, lasting anywhere from one to two minutes every time.
Now, I'm back to where I started. I can crank the motor, but it just won't start. Its doing something new though. When I let go of the key, it backfires.
Anybody have an idea about what I should be checking? I'm not great when it comes to engines, so there might be something obvious that I don't know enough to check.
Now, I finally have good weather and I started working on the motor again today. The first thing I realized was that there was about 10 gallons of three year old gas in the tank, that I had diluted with fresh gas last fall. So I drained the tank and refilled it with some fresh ethanol free. I tried the key and got the same thing as last fall, cranking but no fire.
I changed the spark plugs and poured a little gas in the bowl. The motor started hard, but eventually fired. It ran for about 5 minutes and shut off. It didn't sputter out like it was running out of fuel. It just stopped instantly. I tried again and it stated easy, but only lasted two minutes. I repeated this a handful more times, lasting anywhere from one to two minutes every time.
Now, I'm back to where I started. I can crank the motor, but it just won't start. Its doing something new though. When I let go of the key, it backfires.
Anybody have an idea about what I should be checking? I'm not great when it comes to engines, so there might be something obvious that I don't know enough to check.
