nifego
Recruit
- Joined
- Sep 21, 2017
- Messages
- 5
I have been looking for a post like the one in the following link for so long ... and finally I got it for a reference point!,,,http://forums.iboats.com/forum/gene...op-pitch-or-change-gears-on-bravo-iii-or-both
I experience exactly the same problems has half_fast with his Sea Ray 270, my boat being a Monterey 265 CR of 2004 with Mercruiser's MAG 350 MPI (5.7L, 300 HP), gear ratio 2:1 and original B3 props (pitch 20, 3 by 3). In fact it is nearby a 280 boat since it was sold by Monterey later on as 270 and 275 Cruiser or Sports Cruiser with exactly the same hull design.
My performance problem is even worse than half-fast's, considering that I am already using 20" propellers and the limited engine power: Very long time needed to get on plane. On plane at 3500 rpm. WOT rpm's should be 4600 - 5000, but I can just reach 4100 (at 'only' 30 mph).
Since I boat in the Mediterranean, choppy sea is predominant condition: Fully loaded I won't even get really on plane :-(
Another owner with the same boat and a 320 HP Volvo Penta reported max. speed of 60 kph (37 mph) at 4500 rpm to me.
Antifouling is in bad condition. I will redo it and this action may help to increase 100 - 200 rpm. But I can only drop pitch to minimum 18". So I can gain only 400 rpm.
Has anyone experienced the same problems on a Monterey 265 - 275 CR? Any additional ideas to perform better? Would have been nice to hear how half-fast's story ended.
I am also evaluating changing to Hillmarine's B3 Signature 4 by 4 prop set. Or should I keep a 3 blade rear prop? What about SOLAS 4 by 3? In both cases I will probably loose speed. Or simply keep to a Mercruiser 3 by 3 prop set at pitch 18? But would this solve the hole shot problem?
Thanks in advance for any suggestions!
I experience exactly the same problems has half_fast with his Sea Ray 270, my boat being a Monterey 265 CR of 2004 with Mercruiser's MAG 350 MPI (5.7L, 300 HP), gear ratio 2:1 and original B3 props (pitch 20, 3 by 3). In fact it is nearby a 280 boat since it was sold by Monterey later on as 270 and 275 Cruiser or Sports Cruiser with exactly the same hull design.
My performance problem is even worse than half-fast's, considering that I am already using 20" propellers and the limited engine power: Very long time needed to get on plane. On plane at 3500 rpm. WOT rpm's should be 4600 - 5000, but I can just reach 4100 (at 'only' 30 mph).
Since I boat in the Mediterranean, choppy sea is predominant condition: Fully loaded I won't even get really on plane :-(
Another owner with the same boat and a 320 HP Volvo Penta reported max. speed of 60 kph (37 mph) at 4500 rpm to me.
Antifouling is in bad condition. I will redo it and this action may help to increase 100 - 200 rpm. But I can only drop pitch to minimum 18". So I can gain only 400 rpm.
Has anyone experienced the same problems on a Monterey 265 - 275 CR? Any additional ideas to perform better? Would have been nice to hear how half-fast's story ended.
I am also evaluating changing to Hillmarine's B3 Signature 4 by 4 prop set. Or should I keep a 3 blade rear prop? What about SOLAS 4 by 3? In both cases I will probably loose speed. Or simply keep to a Mercruiser 3 by 3 prop set at pitch 18? But would this solve the hole shot problem?
Thanks in advance for any suggestions!
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