10hp merc been sitting for 3 yrs

[WALLEYE DIVER]

I HAVE AN OLDER 10HP MERC THAT I AM HAVING PROBLEMS WITH. IT HAS BEEN SITTING IN THE GARAGE FOR ABOUT 3YRS. <br />I TOOK IT FISHING LAST WEEK AND IT TOOK A LITTLE BIT TO GET HER GOING BUT IT STARTED UP AND RAN, IT DID SPIT AND SPUTTER BUT KEPT GOING. AFTER A WHILE IT RAN GOOD WIDE OPEN BUT I HAD TO KEEP IT CHOKED AND IT DIDN'T IDLE AT ALL.<br />THE NEXT DAY I TOOK IT OUT AND IT RAN GOOD WIDE OPEN GOING OUT AND COMING IN, BUT I HAD TO KEEP THE CHOKE ON AND IT STILL DIDN'T IDLE AT ALL. <br />SO I CLEANED THE CARB AND PUT NEW PLUGS IN IT. I RAN IT IN MY GARAGE AND IT RAN GOOD, AND IDLED GOOD. <br />LAST NIGHT I TOOK IT OUT TO GO FISHING AND IT RAN AWESOME ON THE WAY OUT, BUT ON THE WAY BACK IT BOGGED WAY DOWN AND STARTED MISSING AGAIN. I NOTICED THAT THE PRIMER BULB WAS NOT STAYING HARD WHEN IT STARTED RUNNING BAD. THEN WHEN I GOT HOME WITH OUT STARTING IT I PUMPED UP THE PRIMER BULB AND IT PUMPED UP AND HELD GOOD. I WAS WONDERING WHY IT WOULD RUN GOOD AND AFTER SHUTTING IT OFF WHILE I FISHED AND STARTING IT LATER ON IT WOULD RUN BAD AGAIN? ANY IDEAS ON WHAT IS GOING ON WITH THIS THING WOULD BE APPRECIATED!

 

[petryshyn]

Re: 10hp merc been sitting for 3 yrs

Are you using fresh fuel/oil mix, or still old stuff?<br /><br />Don't forget, the fuel pump may contain old solidified fuel that can plug carb passages. Cleaning up the carb sometimes is not enough. You may need to clean the pump and lines and tank as well.....

 

[dhammann]

Re: 10hp merc been sitting for 3 yrs

Check gas tank for possible contamination, if the fuel pick-up gets blocked your primer bulb will go down like a deflated balloon.

 

[WALLEYE DIVER]

Re: 10hp merc been sitting for 3 yrs

I USED NEW GAS AND I CLEANED THE TANK. I THINK I AM GOING TO GO BUY A NEW GAS LINE AND BULB. WHAT DO YOU DO TO CLEAN THE FUEL PUMP?

 

[bill giffear]

Re: 10hp merc been sitting for 3 yrs

WALLEYE,THE FUEL PUMP USUALLY HAS A ROUND COVER PLATE WITH A GASKET AND FILTER SCREEN UNDER IT.<br />REMOVE SCREW AND CAP CLEAN FILTER SCREEN,THEN REPLACE. MAYBE YOU MIGHT NEED A NEW FUEL PUMP!<br />NEW ONES TODAY ARE THROW AWAY TYPE.... THAT DON'T PAY TO REBUILD BILL