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08-25-2004, 11:32 AM
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#1
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Registered
Join Date: Jun 2004
Location: California, Maryland
Posts: 14
1994 Sonic 35SS
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Sonic Cavitation
I have a 28' Sonic. The boat has twin 502's. The props are 3-blade 25P, Mirage's. The boat has a BAD cavitation problem, when coming out of the hole, at more than half throttle, AND in rough water. Any suggestions???
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08-25-2004, 11:50 AM
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#2
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Registered
Join Date: Mar 2002
Location: St. Petersburg, FL
Posts: 5,141
Throttle Up Propellers Manufacturer
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Re: Sonic Cavitation
Try a 4 blade prop this should eliminate the problem.
Julie
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08-25-2004, 12:07 PM
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#3
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Charter Member #655
 Charter Member
Join Date: Dec 2000
Location: Holland, Michigan
Posts: 4,940
1993 Sonic 31ss
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Re: Sonic Cavitation
Quote:
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Originally Posted by throttleup
Try a 4 blade prop this should eliminate the problem.
Julie
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Got that right!! 
__________________
If your boat has a sail do you ride a horse to the ramp?
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08-25-2004, 12:10 PM
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#4
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Official OSO boat whore
Charter Member
Join Date: Oct 2000
Location: Mequon, WI
Posts: 6,123
8' row boat
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Re: Sonic Cavitation
The bravo 1 will solve the problems that you are describing.
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08-25-2004, 02:52 PM
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#5
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Gold Member
 Gold Member
Join Date: Apr 2002
Location: lexington park md
Posts: 2,769
1999 Formula 382 Fastech(Race)
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Re: Sonic Cavitation
Ttt
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08-25-2004, 05:57 PM
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#6
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Registered
Join Date: Nov 2000
Location: Westport, Kentucky
Posts: 1,278
Baja Force 235
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Re: Sonic Cavitation
Are you running drive showers by chance? The Simrek can cause cavitation if the tube extends through the anti cav plate too much.
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08-25-2004, 06:22 PM
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#7
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Gold Member
Gold Member
Join Date: Oct 2000
Location: LaPlata, MD, USA
Posts: 4,044
2006 30 Superboat
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Re: Sonic Cavitation
I had the same problem with Mirage+'s on my boat. My prop would break loose and I would have to come off plane to get it to hook up again. I Switched to a Bravo 1 and the issue went away.
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08-25-2004, 07:05 PM
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#8
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Registered
Join Date: Mar 2002
Location: St. Petersburg, FL
Posts: 5,141
Throttle Up Propellers Manufacturer
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Re: Sonic Cavitation
Are the props Mirage's or Mirage Plus'?
What year is your boat?
Typically if your boat is difficult or impossible to get on plane with three blade props it's time to go to 4 blade props. Typically the overall performance of the boat will greatly improve with the 4 blade props
Matt
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08-25-2004, 07:42 PM
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#9
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Platinum Member
 Platinum Member
Join Date: Jun 2004
Location: Frankenmuth
Posts: 4,075
272 baja/99 mph so far/1000 plus hp
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Re: Sonic Cavitation
Did it always do this since you've had it or is it something new? Are you running solid hubs? I had a 23 pitch 3 blade on my baot w/single stock power and it would slip a little out of hole but was fine the rest of the time,i put 50% mor power to it,tried a 27 pitch 3 blade,was super hard to get on plane and slipped almost identical to what your describing,solved problem w/4 blade.
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