sailorickm
New member
"Three days in a row, my 9.9a
"Three days in a row, my 9.9a starts instantly, idles smooth as can be for about 5 minutes and then stops. It won't restart for about 15 minutes then runs fine (stops and restart) all day long.
The 5 minutes or so is suspiciously about how long it runs with the fuel in the bowl when I disconnect the fuel line (for winter storage, for example).
I found a similar post here from a year ago, but the poster never came back to say what it was. The suggestions were to check the plugs, check the fuel O-ring (where the tank hose attaches to the engine, I assume?) and possible exhaust leak starving air (run with cowling off to test).
The only test I've done so far was to put it into gear and run it a bit faster than an idle. Same thing.
I change the oil and spark plugs every spring. I had a carb job done a year ago. This last winter was the first time that I didn't drain the bowl for the winter. The mechanic who did the carb job told me to leave it fuel. I'm in Canada, so it sits in an unheated attached garage for 7 months or more. It gets to 0 deg F in the garage.
Last year I had the fuel filter in backwards for quite some time after the carb job. I don't recall if I put in another new one when I discovered it was backwards. I hope I did; it seems obvious now that I should have thrown it away. (I have a bag full of filters).
The odd thing of course is that once I get it restarted, it runs great all day, even with stops and restarts (it's on a sailboat)."
"Three days in a row, my 9.9a starts instantly, idles smooth as can be for about 5 minutes and then stops. It won't restart for about 15 minutes then runs fine (stops and restart) all day long.
The 5 minutes or so is suspiciously about how long it runs with the fuel in the bowl when I disconnect the fuel line (for winter storage, for example).
I found a similar post here from a year ago, but the poster never came back to say what it was. The suggestions were to check the plugs, check the fuel O-ring (where the tank hose attaches to the engine, I assume?) and possible exhaust leak starving air (run with cowling off to test).
The only test I've done so far was to put it into gear and run it a bit faster than an idle. Same thing.
I change the oil and spark plugs every spring. I had a carb job done a year ago. This last winter was the first time that I didn't drain the bowl for the winter. The mechanic who did the carb job told me to leave it fuel. I'm in Canada, so it sits in an unheated attached garage for 7 months or more. It gets to 0 deg F in the garage.
Last year I had the fuel filter in backwards for quite some time after the carb job. I don't recall if I put in another new one when I discovered it was backwards. I hope I did; it seems obvious now that I should have thrown it away. (I have a bag full of filters).
The odd thing of course is that once I get it restarted, it runs great all day, even with stops and restarts (it's on a sailboat)."