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General Jet Boat Discussions
Jet jon cavitation issues
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<blockquote data-quote="PSG-1" data-source="post: 318059" data-attributes="member: 6937"><p>Check Riva Yamaha performance parts, you should be able to find a top loader grate for that model. These grates are model specific, and will bolt right on with no modification required.</p><p></p><p>With the strakes being on either side of the flow path, they may not be the culprit as I initially thought. Especially if they've already been removed a foot or two in front of the intake area. If the strakes were directly in line with the intake, they would definitely cause issues.</p><p></p><p>That said, you should first try a top loader grate, that's the cheapest, quickest, and simplest variable to experiment with, and I think you'll see some improvement. </p><p></p><p>Next variable would be the AAT nozzle cone, and experiment with different shuttle lengths (be careful, though, too long of a shuttle will over-lug a 2 stroke engine, so, follow the instructions carefully)</p><p></p><p>Another variable to experiment with: the impeller. My guess is that you're probably using a conventional type blade, as that's what most factory impellers are. You could try a Concord (swirl) type impeller, they tend to run better with less cavitation. In my boat, I'm running a 13/19 pitch Solas Concord impeller.</p></blockquote><p></p>
[QUOTE="PSG-1, post: 318059, member: 6937"] Check Riva Yamaha performance parts, you should be able to find a top loader grate for that model. These grates are model specific, and will bolt right on with no modification required. With the strakes being on either side of the flow path, they may not be the culprit as I initially thought. Especially if they've already been removed a foot or two in front of the intake area. If the strakes were directly in line with the intake, they would definitely cause issues. That said, you should first try a top loader grate, that's the cheapest, quickest, and simplest variable to experiment with, and I think you'll see some improvement. Next variable would be the AAT nozzle cone, and experiment with different shuttle lengths (be careful, though, too long of a shuttle will over-lug a 2 stroke engine, so, follow the instructions carefully) Another variable to experiment with: the impeller. My guess is that you're probably using a conventional type blade, as that's what most factory impellers are. You could try a Concord (swirl) type impeller, they tend to run better with less cavitation. In my boat, I'm running a 13/19 pitch Solas Concord impeller. [/QUOTE]
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Jet jon cavitation issues
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