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I just purchased a 1988 22' outrage with a 1999 200hp Yamaha HPDI engine. My max RPM is only 3,600 and I am getting 29mph on my GPS. Has a 19" prop on it now. Engine running fine. I was under the impression that the boat would go faster than this?

Local dealer suggesting I go to 15" aluminum prop (rocks in area!)

Thoughts?

Thanks.

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If you are only able to get 29 MPH with a Yamaha 200 HPDI, the motor is most definitely NOT running fine. Something is very wrong and it's not the propeller. That should be a 45 MPH boat.

Get it to an outboard mechanic immediately.

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Thanks, I had a fuel problem last year from ethanol. Had tank emptied, new filters, etc..., but hadn't used till now. Maybe fuel issue ever since I bought it?

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I know that this is an old post but I was doing a search and this came up. I'm having the same problem with my 2000 Outrage 21. I have a 2003 Yamaha 200 HPDI on my 2000 Boston Whaler 21' Outrage. I've got it out of the water and doing work on it during the "off season". Can't really call it that but I had to make a mental break to pull it out. I had the outboard serviced and it has a clean bill of health but after reading up on that outboard I now know that I'm not getting the RPM's out of it that I should. Currently I get 47-4800 RPM at WOT when lightly loaded and trimmed out perfectly. It lists that I should get 5500-5700 RPM at WOT. I'm currently running a 15 1/4" X 17 SS prop.

Any tips or recommendations would be greatly appreciated. I'm having a hard time finding a shop that will let me demo a used 15 pitch prop before purchase. Any prop guy or shop recommendations?

-Ryan_J

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My 22' has a 200 hp Yamaha carbed motor. I was having issues last year and had all 6 carbs pulled and cleaned right at the boat. I was there and the mechanic never "found the problem" but it runs great after re-assembly. My guess is that you have an injector problem.
Even the best mechanics cannot be sure the motor is going to perform under load. That is why they use a test tank with the boat on the trailer. In my case we lowered the rear of the lift and kept the front higher. This allowed full load of motor with prop spinning. Used a rag to block one carb at a time to see if performance changed. Two of the six resulted in no change ie. they were not putting fuel into the motor.
My boat is not near by or I would check what is on it. I would never put an aluminum prop on a boat and motor set up like yours.

Tom Clark has forgotten more about props than I will ever know, but I would agree with his comment to the op.