Stainless Steel/Nylon Thru Hull with Barb | Whitecap S-3810 Telescoping Brush Poles You should change the impeller

You should change the impeller every 100 engine hours or every two years

Conversely

Engine Control R116026

Use kit p/n 3744265K if converting from old style fuel pump without vent tube provision

You will notice a significant improvement in stability and fuel economy

Stainless Steel/Nylon Thru Hull with Barb | Whitecap S-3810 Telescoping Brush Poles You should change the impellerStainless Steel Nylon Thru Hull with Barb Whitecap S 3810 Stainless Steel Nylon Thru Hull with Barb Whitecap S 3810 1 1 8 in. Hose Barb 316 Stainless Steel Nylon Thru Hull 90 degree 1 7 8 in. flange diameter 1 5 8 in. thread length 3 1 2 in. overall length 1 5 16 in. cutout