SERIOUS ISSUE'S WITH NEW REPOWER -SUZUKI 300/PARKER2320-

[Ralph AHCOR]

Just did a sea trial yesterday on my 2005 Parker 2320, repowered with a Suzuki DP300AP 25" shaft installed with a 15X15 3/4 Suzuki prop from the dealer.

Boat was never able to plane no matter what speed. I Replaced my Yamaha F250TXRD 25" shaft that ran amazing well until it blew!

I tried moving the trim tabs every position, every speed, triming the motor and everything else. When I went as fast as 5k rpm it would shoot to 6krpms and sounded like it was out of water and shooted water up! [emoji21]
Dealership is 2 hours away and would like to try a few things before I send it back for help.
Any information on where to go next is sincerely appreciate it. 

Best 
Ralph

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[Brent]

What is the motor height ?

Hole #1 is the top hole closer to the sky.


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[Antidote]

Wrong prop. You need a higher pitch. It's not pushing enough water to move the boat forward. The Yamaha site has reference sheets for engines and boats. Check and see if Suzuki does also. I'm guessing about a 20-21 pitch prop is what you'll be looking for.

 

[albiejunkie]

Pretty sure you can swing a 16" diameter prop on that

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[Ralph AHCOR]

Last hole on the top

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[Brent]

Looks like too deep and needs to be raised until the vent or anti cavitation plate is totally out of the water when on plane. Rule of thumb is dial in motor height then prop


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[Ralph AHCOR]

Here's a full picture.

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[Brent]

Mechanical or fly by wire controls?


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[Ralph AHCOR]

Mechanical or fly by wire controls?


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Digital

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[Brent]

That looks good on the hard but is the vent plate clearing the water when on plane. Probably need computer to scan the system for the setup. Return to dealer.


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[Ralph AHCOR]

CORRECTION: My apologies

My prop is 15 1l4 inch with a 19 inch pitch.

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[Bmoore]

I wonder if it could be that transom mounted transducer causing just enough water disturbance to cause the engine to ventilate ? I recently saw a guy on Facebook ( NW Parker Owner’s ) complaining of exact same issue. Ended up being his transducer in same spot causing the problem. Just a thought ?

Here’s what the guy said......


Yesterday I made a post asking for your guyses help to figure out why my engine was cavitating when I tried to get up on a plane. I want to thank all of you again for your input. I went out with my service manager this morning and we tried to figure it out and every time we get up around 4100 RPM the engine would start cavitating when we tried to put it up on a plane with the permatrim on. No such luck so we went back to the dock and took off the permatrim and went out again and I had no such luck the engine would start cavitating every time we got up around 4100 RPMs. Well the both of us was kind of scratching our heads and we took my boat back to the shop. I was talking to my service manager any suggested maybe we lower the motor to the top hole on the engine mount. I had new electronics put on the boat including a new transducer. Then he looked at me and said Bob I can't believe I didn't notice that before and I said to him what is that Chris he said that transducer you have it's right in the middle of your transom on the lowest part of the hull. I said yeah he said that could very well be the problem so he said to me that he was going to take that transducer disconnect it and secure it off to the side and go back out and try again to get my boat to go up on a plane. well this evening about 2 hours after closing time my service manager Chris called me up and told me that was the problem. We took your boat out and it got up on a plane no problem we cruised along about 36 to 41 miles an hour and was taching out about 6000. The engine purred like a kitten and everything ran great. I might just be the happiest Parker owner tonight. That transducer was causing enough air bubbles to cause the engine to cavitate, who would have ever thought

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[Brent]

Good point. Do you have a better pic of the transducer


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[Ralph AHCOR]

OMG, the old motor worked fine but I think it's worth a try. Did you know what type if transducer?

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[Ralph AHCOR]

I wonder if it could be that transom mounted transducer causing just enough water disturbance to cause the engine to ventilate ? I recently saw a guy on Facebook ( NW Parker Owner’s ) complaining of exact same issue. Ended up being his transducer in same spot causing the problem. Just a thought ?

Here’s what the guy said......


Yesterday I made a post asking for your guyses help to figure out why my engine was cavitating when I tried to get up on a plane. I want to thank all of you again for your input. I went out with my service manager this morning and we tried to figure it out and every time we get up around 4100 RPM the engine would start cavitating when we tried to put it up on a plane with the permatrim on. No such luck so we went back to the dock and took off the permatrim and went out again and I had no such luck the engine would start cavitating every time we got up around 4100 RPMs. Well the both of us was kind of scratching our heads and we took my boat back to the shop. I was talking to my service manager any suggested maybe we lower the motor to the top hole on the engine mount. I had new electronics put on the boat including a new transducer. Then he looked at me and said Bob I can't believe I didn't notice that before and I said to him what is that Chris he said that transducer you have it's right in the middle of your transom on the lowest part of the hull. I said yeah he said that could very well be the problem so he said to me that he was going to take that transducer disconnect it and secure it off to the side and go back out and try again to get my boat to go up on a plane. well this evening about 2 hours after closing time my service manager Chris called me up and told me that was the problem. We took your boat out and it got up on a plane no problem we cruised along about 36 to 41 miles an hour and was taching out about 6000. The engine purred like a kitten and everything ran great. I might just be the happiest Parker owner tonight. That transducer was causing enough air bubbles to cause the engine to cavitate, who would have ever thought

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Same thing is happening but at 5100rpm...

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[Bmoore]

OMG, the old motor worked fine but I think it's worth a try. Did you know what type if transducer?

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I’m not sure what type, but I’m guessing something similar.


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[Brent]

Mounted incorrectly and needs to be moved.


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[Ralph AHCOR]

Mounted incorrectly and needs to be moved.


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I agree, thanks Brent

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[Ralph AHCOR]

I wonder if it could be that transom mounted transducer causing just enough water disturbance to cause the engine to ventilate ? I recently saw a guy on Facebook ( NW Parker Owner’s ) complaining of exact same issue. Ended up being his transducer in same spot causing the problem. Just a thought ?

Here’s what the guy said......


Yesterday I made a post asking for your guyses help to figure out why my engine was cavitating when I tried to get up on a plane. I want to thank all of you again for your input. I went out with my service manager this morning and we tried to figure it out and every time we get up around 4100 RPM the engine would start cavitating when we tried to put it up on a plane with the permatrim on. No such luck so we went back to the dock and took off the permatrim and went out again and I had no such luck the engine would start cavitating every time we got up around 4100 RPMs. Well the both of us was kind of scratching our heads and we took my boat back to the shop. I was talking to my service manager any suggested maybe we lower the motor to the top hole on the engine mount. I had new electronics put on the boat including a new transducer. Then he looked at me and said Bob I can't believe I didn't notice that before and I said to him what is that Chris he said that transducer you have it's right in the middle of your transom on the lowest part of the hull. I said yeah he said that could very well be the problem so he said to me that he was going to take that transducer disconnect it and secure it off to the side and go back out and try again to get my boat to go up on a plane. well this evening about 2 hours after closing time my service manager Chris called me up and told me that was the problem. We took your boat out and it got up on a plane no problem we cruised along about 36 to 41 miles an hour and was taching out about 6000. The engine purred like a kitten and everything ran great. I might just be the happiest Parker owner tonight. That transducer was causing enough air bubbles to cause the engine to cavitate, who would have ever thought

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Same thing is happening but at 5100rpm...

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Thanks for sharing Bmoore!

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[Brent]

Need pic showing more details including tabs


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