Aquasport 222 identification and rebuild

[redemn93]

ya something is up there.  what size/pitch prop are you running?  even if the motor is buried in the water it would run alot faster than 18mph at 6k rpm.  pick up a cheap tiny tach or any other cheap tach and hook it up to compare rpm readings with your gauge.  compression good across the board on the motor?

[h20ryder]

I have another tach and it was showing the same RPM but the settings on the back were the same "3P 6C." Picked up a new timing light with digital RPM readings so going to run the motor on the hose tonight and see if that matches the tachs.
Prop is an aluminum 15" x 17 pitch 3 blade. It came with the motor and is in good shape (no dings or chunks missing).
Followed the 1" up for every 1' back rule with the engine bracket using a piece of angle iron along the keel for measurement. The ventilation plate was actually 2.25" up from the keel but I took the below pic while running. It was buried pretty good but we also weren't on plane yet.
Compression is even on all cylinders (87lbs). Had to replace power pack, rectifier, and all new plugs and wires too. Overall it runs great.
?

[gran398]

Excellent job on the report.

I'm going to get in touch with Nando, he runs a 19-6 with a bracket.

Hang tight....something's funny here.

PS...what is that piece of metal under the bracket?

[Capt. Bob]

Hub slipping/damaged on the prop?

[Capt. Bob]

PS...what is that piece of metal under the bracket?

Side scan transducer????

[h20ryder]

Bracket has 2 holes for extra adjustability and motor has 4 holes. I should be able to move it a lot if needed.
Piece of metal under bracket is the transducer for my StructureScan. It's big but awesome.

What do I look for on the prop hub to know if its damaged? Will take a pic tonight.

[Capt. Bob]

What do I look for on the prop hub to know if its damaged? Will take a pic tonight.

Don't know that you can "see it" but you could try marking the hub and the prop (paint) and trying it. If they don't line up, bingo.

Trying another prop (if available) would be a better (easier) and see if that helps. Doesn't need to be the exact dia/pitch, just something to indicate a bad prop. Do you have access to another of any size that will fit?

[h20ryder]

Unfortunately no access to other props. All the local shops want to sell me one and then can "change to a different one for free if it doesn't work."
All props on Craigslist here locally are expensive just for a test prop.

[Blue Agave]

H2Oryder here are my thoughts

1) have you contacted the tach manufacture for the correct setting on the tach?
2) as Capt. Bob stated, hub slipping
3) 6000 RPMs regardless of speed is high for the motor, I believe you should be at 5400 / 5500 for that OMC motor
4) 17' pitch seems small for that boat. If you can confirm the setting with the tach manufacture and can also confirm no hub slippage, you're going to need a larger pitch prop.
5) regarding motor height, what is the setback on your bracket?  My bracket has a 30" setback and my cavitation plate is 2 1/2 inches above the bottom of the boat.

[gran398]

Just speculation, but my concern looking at the size/position of the transducer....when she squats to get on plane the prop may not be getting clean water due to the 'ducer. Frothy water, spinning in air/water and revving up, not biting.

[RickK]

Sounds viable Gran.  
As said earlier - you want smooth water for the 'ducer and the motor needs pure water to stay cool and also bite.  Maybe that 'ducer would work great without a bracket because the water pickups are not far from the ducer. I think it is beating up the water too much before pickups.  Almost looks like a planer.
My $.01

[gran398]

Exactly.

The more I look at that pic....the water is aerated in a pretty large area.

As a test, pull the 'ducer (or tape it on top of the bracket) and run her. If that's the culprit, you'll know on the first hole shot.

[h20ryder]

H2Oryder here are my thoughts

1) have you contacted the tach manufacture for the correct setting on the tach?
2) as Capt. Bob stated, hub slipping
3) 6000 RPMs regardless of speed is high for the motor, I believe you should be at 5400 / 5500 for that OMC motor
4) 17' pitch seems small for that boat. If you can confirm the setting with the tach manufacture and can also confirm no hub slippage, you're going to need a larger pitch prop.
5) regarding motor height, what is the setback on your bracket?  My bracket has a 30" setback and my cavitation plate is 2 1/2 inches above the bottom of the boat.

1) Just called Teleflex and they said setting for tach on the instruction sheet that came with the gauge is wrong and assumes I/O motor even though it says "Outboard." So now I need to move the setting to "6P." Did I really drive around all day at 1/5th throttle? Throttle cable needs to be adjusted too since it was almost all the way down.
2) Found the prop number I had noted on my phone. Its a 391200 15x17 which looks like a Michigan Wheel prop with a "pressed in bearing" if that makes any difference.
3) 6000 is really high and I didn't think it sounded like it was going that fast. Will know more tonight once I adjust tachs.
4) Probably going to buy another prop and use current as backup. Thinking a 14" with 21 pitch 4 blade.
5) Motor is setback 22"

Just speculation, but my concern looking at the size/position of the transducer....when she squats to get on plane the prop isn't getting clean water due to the 'ducer. Frothy water, spinning in air/water and revving up, not biting.

I can easily move the transducer if that is causing too much cavitation. That was the suggested location by Lowrance even with a bracket. But I was having the same problem even from sitting still 0mph so there really wasn't any turbulence yet I don't think. I can remove the transducer easily though to test.

[Blue Agave]

H2Oryder here are my thoughts

1) have you contacted the tach manufacture for the correct setting on the tach?
2) as Capt. Bob stated, hub slipping
3) 6000 RPMs regardless of speed is high for the motor, I believe you should be at 5400 / 5500 for that OMC motor
4) 17' pitch seems small for that boat. If you can confirm the setting with the tach manufacture and can also confirm no hub slippage, you're going to need a larger pitch prop.
5) regarding motor height, what is the setback on your bracket?  My bracket has a 30" setback and my cavitation plate is 2 1/2 inches above the bottom of the boat.

1) Just called Teleflex and they said setting for tach on the instruction sheet that came with the gauge is wrong and assumes I/O motor even though it says "Outboard." So now I need to move the setting to "6P." Did I really drive around all day at 1/5th throttle? Throttle cable needs to be adjusted too since it was almost all the way down.
2) Found the prop number I had noted on my phone. Its a 391200 15x17 which looks like a Michigan Wheel prop with a "pressed in bearing" if that makes any difference.
3) 6000 is really high and I didn't think it sounded like it was going that fast. Will know more tonight once I adjust tachs.
4) Probably going to buy another prop and use current as backup. Thinking a 14" with 21 pitch 4 blade.
5) Motor is setback 22"

Do you have a water pressure gauge?  If not, I high recommend one.  At 22" setback @2.25" up may be a bit too high.  I recommend running it once you get the tach sorted keeping an eye on the water pressure gauge and the tell tale.  I'm running 19" pitch four blade on mine but my motor can run 6000 RPMs all day long, verify what the max RPMs are for your motor and try not to over rev.

[redemn93]

you also probably want a prop somewhere around 20-21 pitch.  17 will give you great hole shot but not much on the top end.  unless rudes are just different.  i bet you were just running low rpm due to tach setting or prop/hub is slipping as mentioned before.