79 2 hp johnson - water pump Q

[BF]

Hi all,<br /><br />I noticed that my little kicker isn't spitting water out like it should. In the owner's manual it says that the water pump acts as a "displacement" pump at low rpm's and a "centrifugal" pump at high rpm's.<br /><br />I haven't opened it up yet, but is there anything different with this little pump than others?? Does it have a rubber impeller etc?? FYI, I'll get a service manual for it this week, but I'm curious whether this is the typical outboard water pump or something different.<br /><br />Anybody worked on a water pump on these little guys? Any tricks?<br /><br />Thx<br /><br />Brent

 

[JB]

Re: 79 2 hp johnson - water pump Q

The main secret is to have the manual, BF. You've taken care of that.<br /><br />Good luck.

 

[BF]

Re: 79 2 hp johnson - water pump Q

----- an update ----<br /><br />Couldn't wait for the service manual, so I picked up an impeller and pulled the LU off last night. No problem, 2 bolts for LU, 2 screws for pump housing. It has a good ole rubber impeller (a wee one). <br /><br />Has anyone ever heard of an outboard water pump referred to as a "displacement pump" at low rpm's and a "centrifugal pump" at high rpm's? Seems a funny thing to read in an owner's manual.<br /><br />Brent