Carbed 502/502HP fueling issues on 1996 Baja 272 Islander
#43
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iTrader: (1)
The higher the rise, with stock outlet location, = greater fall. Yes, better way to do it. The later HP500's had a very big rise + fall for a reason. The earlier low rise one's didn't work out so well for some people.
#46
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iTrader: (28)
Also, the length of the pipe before water and exhaust is important, not just the height of the riser. You would be fine with the standard riser height, no need for added height (not saying that it's a bad idea, just not 100% needed) as long as you have risers that extend to or very close to the transom before mixing water with exhaust gases. This would prevent the engine from being able to suck the water back as well.