RE: Unofficial
It may also depend somewhat on the shape of the grate as well. Mine will lose prime occasionally when jumping in rapids or waves, but when running the motor at full tilt it will pick it right back up and keep going. I did have a problem with mine earlier this continully losing prime & I finally checked the shaft bushing going to the motor. It was loose and the hole was egged. So after rebushing it and doing the bearing mod (I have a mini jet in my knock off) the priming issue dissapeared. Just a thought but maybe check your shaft holes.