How are you testing your water pump?I have a 94 Mariner Magnum 40HP, serial 0G138021 with water flo issue
I replaced impeller with a complete kit, but still no flow out of motor.
At a loss of whats next to try... Any help is appreciated
Only by putting motor back together.How are you testing your water pump?
Only by putting motor back together.
How else would you test it?
I used muffs with the garden hose ..You can't test a water pump without water. And not on muffs. Use a large and deep barrel or back the boat down a ramp until the lower unit is deep under water.