2007 300XS
1E002707
I’m having trouble starting after fishing for more than an hour. Takes about 3 times cranking the motor before it gets fuel. Anything under an hour she starts right up. I had the fuel lines and bulb changed about 8 months ago. This just started happening the last few trips. Any ideas?
Try pumping the bulb before every start. Seems to be more important during warm weather.
I’ve not had this problem in any weather. Seems like the check valve in the new bulb is leaking back. They’re fairly cheap, I’d replace the bulb.
2008 BULLET 21XD 2007 Merc 300xs
THIS ^^^ is the correct answer. Pump primer bulb firm before EVERY engine start, and yes, it is extremely critical when ambient temps reach or exceed 60 degrees F.Originally Posted by Jtreed99
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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New primer bulb installed. I can prime the bulb before starting and it will still take 2-3 try’s to start. It sounds like it’s fuel starved. On the 3rd try it sounds normal and starts right up .
Does the bulb get totally hard that you can't squeeze it in anymore?
Yes.
Do you hear the fuel pumps running when the problem occurs?
yes I can hear it prime up for 2-3 seconds with the first click of the key.
It is probably not a case of it lacking for fuel, then. Best way to KNOW is to get it on a set of Glycerin-Dampened Gauges to check the Air and Fuel Pressures properly.
If your starting attempts are resulting in a lot of cranking with what seems like an "I think I can, I think I can faster, Nope, didn't work" sound, CHECK THE LOWER TEETH ON THE FLYWHEEL FOR RUST OR LOOSE/RUSTY PAINT.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
It will start with only a few cylinders hitting then die. 2nd time for a few more seconds and die. Third crank purrs like a kitten
Have the pressures checked (of course, an eyeball inspection of those lower teeth is simple for you to do yourself).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Thanks. I’ll go take a look
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