Re: Gamefisher Impeller Replacement. Go to www3.sears.com put your model number in and go to the diagrams. Choose the gearcase diagram which shows the driveshaft. It& 39;s a simple splined end that goes into a coupler on the engine. It& 39;s designed like most outboards to slide in and out with the installation and removal of the gearcase.
cyclone said: its pretty much impossible to say which impeller will make the boat fastest with absolute certainty. You& 39;ll never know until the boat is in the water. With the info you have a competent pump guy can use the charts to pick an impeller for the boat that runs near your engine& 39; peak hp rpm at WOT which would be a good place to start.
Correctly Setting Your Impeller. Using a dial indi or: Check for runout on the back edge of the impeller shroud. Consult with the manufacturer for acceptable tolerances. On an open-style impeller one vane tip that is sticking out will yield a false setting clearance and can easily affect the pump performance.
My VP impeller is right at the front of the motor...16 screws gets the bench seat loose and another four gets me into the impeller housing. My old one will at least get me to shore in a pinch. Better yet sell your old one on eBay as "slightly used"...some poor sap who doesn& 39;t frequent iBoats will buy it... I& 39;m kidding of course.
Step 9: Reassemble Your Pump. Now that your new impeller is ready screw it back onto the motor shaft making sure that the seal seats itself properly on its other half. You can hand-tighten it; no need to torque it down. Put the capacitor back into the pump’s motor assembly and reattach it to its leads put the plastic strip back into place ...
The Impeller Is Living on Borrowed Time: Always inspect your impeller when you prepare your boat engine water pump each spring. Your marine engine water pump& 39;s impeller has a service life of about 300 operating hours or three years whichever comes first. If you haven& 39;t changed the impeller in so many years or operating hours it& 39;s time.
If you use your boat the impeller wears needs replacing. If you don& 39;t use your boat the impeller sits in the housing with the blades bent over and looses it& 39;s elasticity. So either way it goes bad. Suggested replacement interval is every other year. Unless you run in silty or sandy water like shallow rivers.
To install the impeller lube the entire exterior with glycerin. After lubing compress it with your fingers and seat it into the pump body.. I often hear of folks talking of using zip ties to pre-compress the impeller for insertion but I honestly don’t understand why one would need to do so.