The Mariah Owners Club - 4 Blade Options for a 96 202 Shabah W/5.7 A1

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- - 4 Blade Options for a 96 202 Shabah W/5.7 A1 (http://www.mariahownersclub.com/forum/prop-talk/10735-4-blade-options-96-202-shabah-w-5-7-a1.html)

Re: 4 Blade Options for a 96 202 Shabah W/5.7 A1

Quote:

Originally Posted by gahooligan (Post 59890)

Iced... curious to see your results. My 19p should have been perfect but i was suprised i could pull top rpm... please let us know how your 20p does. Is it a turning point prop?

Mine is a pro-tec prop I believe. Local prop shop says pattern perfect knock off of the Mercury Marine Alpha 4 which he would normally sell me but apparently can't get any of right now.

Re: 4 Blade Options for a 96 202 Shabah W/5.7 A1

Quote:

Originally Posted by Firestone (Post 59913)

I just tried a 4 blade 14 x 19P on my Z202 with 5.7L MAG and it was a total dog with low RPM, poor hole shot, and could only go 38 mpg gps. I moved back to my original SS 4 blade 14.25 x 17P to get 47 MPH GPS at about 5000 ft elevation. I can pop a 230lbs skiier right out of the water with 6 people in the boat with the 17P. Installed the smart tabs at the start of the month and tossed the whale tail in the trash. I was just shocked by the poor performance of the 19P based on all of your comments. I bought the boat in May and do not know the gear ratio, but would my elevation make that much difference?

Firestone - 2000 Mariah Z202 5.7L MAG Alpha I Gen II

Interesting that you didn't like the 19p but I'm not surprised since most places say for ever 1000 ft go a degree down (https://www.acepropeller.com/high-al...r-performance/) so from me at 1400 ft to you at 5000 that'd be 3-4 degrees back. If you love the 17p I'll be pretty close to the same performance on a 20. AFAIK the Alpha1 Gen2's are all looking at the 1.47ratio.

This by the way is a good point, we should add the elevation we're at when swapping "What works for me" prop discussion less someone assume we're all at sea level.

My other option is a 4x18* but the shop is afraid I'll over-rev pretty easily. They said if I didn't like the 20 and don't damage it obviously I can come swap for the 18 and try it.

Re: 4 Blade Options for a 96 202 Shabah W/5.7 A1

Good point! To clarify, my lake at full pool is 1071 ft. I was running a stock 3 blade 21p aluminum with decent all around results but after adding accessories (weight) to the boat i wanted performance back.

Re: 4 Blade Options for a 96 202 Shabah W/5.7 A1

Well I am very happy with the 20p 4 blade. Up and out much faster. 47mph top speed @4800rpm with a full tank. On plane longer. Trim is actually useful now too.

Very positive change overall so glad I did it.

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