Been having an ongoing issue with my Seadoo. It will run for a few hours, or in some cases even multiple days, with no issues. And then without cause it seems to just bog down and will not accelerate. It will idle fine but when you get on the throttle it either bogs down or slowly revs without accelerating. After replacing the spark plugs, it will run fine for another couple hours and then do the same thing. The mechanic said it was an oil pump issue so we had that replaced and again new plugs put in it, but the same issue is happening. Any ideas or input? Thanks