I took a look at my Water pump yesterday (03 VMax 150 Carb Model)because of low water pressure last season (on the gauge and peehole). It was fried...and melted in places, so I replaced the housing and impeller along with new seals and coller. Water pressure did increase some, but not as nearly as strong as when it was new. When I turn the engine off, I can hear water gurgling back out of what I'm guessing the block. I'm thinking the engine may have a piece of melted plastic somewhere blocking the water. Any way to check for this?..Thanks