merc 110 9.8 hp water pump

[BJerden]

Hello Im new to boat motors I have a 9.8 1968 i belive sn 2617731 i am having trouble with my water pump I replaced the impeller and the housing but i still dont get any water up to the water out let how does it work? there is a copper tube about 3/8th in running down to the pump it goes into the sleeve at the top of the water pump but there is no seal around this pipe ? no need to tell me how little i know thanks have a great weekend

 

[The Marine Doctor]

Re: merc 110 9.8 hp water pump

The water pipe needs to be sealed at the top. If it is not sealed the result is overheating due to no water flow.<br /><br />You will have to remove the powerhead and replace the grommet.<br /><br />TMD

 

[greasemonkeyozi]

Re: merc 110 9.8 hp water pump

Did you install your impeller backwards?<br /> Another senario is that a small piece of impeller could have broke off in the past clogging a hose or something. Good luck.

 

[streadway]

Re: merc 110 9.8 hp water pump

I HAVE A 1970 MERC 9.8.WENT THROUGH ALL THE BULL WITH THE IMPELLAR.THE BEST THING TO DO WITH THE OLD MERCS IS TO ORDER A NEW WATER PUMP STILL AVALABLE FROM MERC,AROUND $68 GOT IT IN 3 DAYS THROUGH MERC PARTS EXPRESS.IT HAS ALL THE SEALS AND NWE IMPELLAR WITH IT.IT IT IMPORTANT TO REPLACE THE SEALS ,TO KEEP WATER OUT OF THE LOWER UNIT.ALSO I WAS LOOSING WATER PRESSURE THROUGH THE SEAL ON THE MAIN SHAFT.SINCE I REPLACED THE PUMP NO WATER GETTING IN LOWER UNIT.BE SURE AND CHECK FOR BLOCKAGE IN THE COOLING SYSTEM BEFORE YOU BOLT IT BACK TOGETHER AND DON'T FORGET TO PRE LUBE THE IMPELLAR.