2011 nitro z 8 250 4 stroke mercury

[senghunter]

have been trying props without much success 23 pitch fury 60 mph 5700 rpm.24 fury 61 mph 5600 rpm. 24 pitch fury 4 blade 63 mph.5700 rpm. all gps speed ptp height 2 1/2 to 3 1/2. 2021 250 merc.4 stoke 280 hrs. any help would be greatly appreciated. hole shot is good with all props. mid range and top speed pretty weak.

[BMCD]

Might want to try a Tempest, Fury's were not the best for me on my z9 of those years.

But your getting rather high slip numbers. Do you know how the boat ran with the 2 stroke?

[senghunter]

ran a 27 bravo1 xs 70 to 72 2 1/2 below the pad strong mid range good top speed handled great just had a chance to upgrade to a 4 stroke

[BMCD]

U sure your getting full throttle? Could the tach be off?

[senghunter]

going to my merc.mech. this week to check hot foot setting ecu setting and trim setting hopefully they can figure it out.

[BMCD]

Did this get resolved?

[senghunter]

i took in in and this is what they found had to reset my older hotfoot also had to reset the trim range it was off by a good margin replaced the spark plugs believe they were original took it out and ran it and the results were71 gps speed at 6200 rpm analog tach off by a 100 rpms high that was with a 24 pitch fury 3 at 3ins below the pad pretty happy with the results my ech. also said i could lower the engine a little and prob.gain a little speed.would like to say thanks for the help also on a side note would a 25 pitch bravo 1 fs be a good choice for this setup i have had good luck with bravos in the past. thanks again

[BMCD]

Bravo would be a very good option. I can't answer on pitch but think a 25p bravo might be not enuff. I think a 25p bravo is like a 23p Fury on RPMs. Someone who knows for sure can chime in.

[PaulGifto]

This is a good thread for me. I have a 2013 Z9 with the same motor and am getting poor results. I’m going to the shop in the spring a I only ran the rig a few times when I got it. Thanks for posting this

[BMCD]

Paul what prop u running? and RPMs

[PaulGifto]

Currently I have. 23p4 blade fury 4 I think I seen like 5500 rpm

[BMCD]

Yeah, U need some RPMs. Like u mentioned taking it too shop to inspect that your getting Full throttle.

[PaulGifto]

I will report back in the spring when I get it set up right. This set up should do 70 pretty easy. I'd be more than fine with that.