140 hp merc outboard hard starting after stopping

[Vanard]

Thx. for the help last time, this site is great...
Here's the problem, when I go cruising around and I stop and kill the motor for whatever reason for more then like 5 minutes the motor just doesn't want to crank over...
Even if I prime it, choke, advance the timing, whatever. It really is embarassing and not very reassuring. I had some choke/carb cleaner on board and sprayed some of that in all 3 carbs a couple cranks later it's just fine...I know the carbs, floats and jets are good...I just recently got the gas guage to work. Haven't had it on the lake since, but I was generally only putting in 2-3 gallons at a time because it's two stroke and I wanted to make sure the fuel mixture would be ok
Is it possible that after riding around the six cylinder has eaten so much gas that I'm slowly getting air in the system??? Anybody have any ideas???

 

[studlymandingo]

Re: 140 hp merc outboard hard starting after stopping

It could be the check valve in your bulb is not working properly, I have been hearing tale of an anti-siphon valve as well.

Have you tried pumping the bulb back up before you take off?​

 

[Silvertip]

Re: 140 hp merc outboard hard starting after stopping

A 140 will burn about 14 gallons of fuel per hour at wide open throttle so two or three gallons of fuel will be consumed in a very short time. I don't understand why you only put 2 or 3 gallons of fuel in at a time. If it's oil injected it doesn't matter how much fuel you put in. If you are premixing fuel it is a lot easier to mix fuel in six gallon cans (1 pint of oil). Spraying carb cleaner in the throat of a carb does nothing except clean the throat. It gets nowhere near the internal parts of the carb so all its really doing for you is acting like starting fluid (which you should not use on a two stroke).

 

[Vanard]

Re: 140 hp merc outboard hard starting after stopping

Yes I'm priming the bulb afterwords... Should I go and buy a new bulb and see if that could be it???
I only had a 2 gallon can... But I fixed the gauge so thatwill no longer be a proble...Keep in mind this is my first boat...thx