Question.....
 

Need some input guys. I have a 2000 29 Outlaw. 454 mpi's with labbed 24p props. Last year I was running 72 gps. Had one of the drives replaced and now run 69. The rpms seem to be about 200 less. Same drive ratio at 1.5. I was getting about 4800-4900 on the tach now I get 4600-4700. I put my labbed 26's on and run 4500-4600 at almost the exact same speed as the 24's. Any thooughts? Thanks.


Also, any thoughts of taking 4 blades off and putting a 25p 3 blade?

Re: Question.....
 

I have a 2001 302 with same engines and dives I turn 24 4's at 4900 with no trim on the drive and 5100 with full trim. I am running about 68 GPS so your speed may be about right for the rpm but where you lost 200 rpm I have no idea. Fuel, water conditions, temp, load ect may have something to do with the loss.

Re: Question.....
 

THE 3 BLADE 25 MIRAGES WILL BLOW OUT BUT YOU MIGHT PICK UP YOUR RPMS . ARE BOTH ENGINES DOWN 200 OR JUST ONE..

Re: Question.....
 

Both are.

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The Mirages are good props for that boat, you just need to keep the rpm's below about 3300 when getting on plane or they'll blow out.

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Have you tuned up the engine's yet?

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Engines are tuned. Boat runs very well. Just changed out the bad drive and since then this situation started.

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IF IT IS BOTH MOTORS I DON'T THINK IT'S THE DRIVE
IF IT WAS IT WOULD BE THE MOTOR WITH THE NEW DRIVE.
DID YOU DO ANY PROP WORK?
NOTHING NEW SINCE LAST YEAR?

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are they mags?

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Yes they are mags. Adjusted the drive stops. Looking at the drives they didn't seem to be even. Brought rpms up a little with the 26's on. Seemed to run better then before with trim at about 1/4. Going to put 24's on Friday and see how it goes. Maybe that's all the problem was. Any tricks to adjusting the drives or just trial and error?

Re: Question.....
 

I am having the EXACT same problem. I have 29 with HO's and was getting 5200 at 78 on GPS....I recently had one drive worked on and during the process they switched the drives from one side to another to check something out (long story)....They left the drives switched which they indicated was no big deal....Bottom line is that both drives were off the boat at one point.... I'm now getting about 4900 and 74.5 GPS. 26P Bravo's......This is loss of 3 or 4 MPH with same conditions, load, etc...The driving indicator is showing one drive higher than other.....I'm wondering if they placed the stop in the wrong spot or if they didn't align the drives correctly, or other issues????? While 3 or 4 mph isn't the end of the world, it sure bugs me.......thoughts guys?

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Update.....Re-aligned my drives and threw on some K and N filters (thanks Trick Marine). Now I can turn my 26's at 5k rpm and hit 73.4 gps. Fastest prior was about 72.

Re: Question.....
 

damn, i didnt know the drives out of align slowed you down that much. maybe i should check mine