Need help with my 50hp boat outboard

[Pinhead]

Hi guys, I’m having a problem pinpointing the issue with my 1992 2stroke Nissan 50hp tiller motor. I’m not getting water up to the top and out the drain hose. I changed out the impeller but still no water. What happens after the impeller? Does the water continue up the water pipe into the head and then expelled out the drain? I had help with someone knowledgeable about impellers help me change that, so let’s assume that’s not the problem.

What else could be wrong. The water pump system looks relatively simple, what am I missing?

Thanks,

Dan