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Now whether you believe these numbers or not, they are published on Yamaha's and others performance bulletins websites.
21 SLX with a overall length of 22', top end is 41.4mph per Yamaha's test page. SPS toon package.
2274 GLI with a overall length of 22'6" top end is 40.9mph per Yamaha's test page. Twin 32" elips with strakes.
23RSB with a overall length of 25'3" (granted it was a 200hp) and top end was 41.5mph but its a 25 foot boat.
file:///C:/Users/xzzgb3/Downloads/1202-G2-200HP-Bennington-R23-RSFB.pdf
Sweetwater (not a Benny, but at 24'11 inches LOA ) with a Yamaha 150hp had a top end of 40.7mph (triple 25" tubes)
Avalon 2485 (not a Benny, but at 24 ' LOA ) with a 135hp Evinrude HO has a top end of 38mph (HO motor being key here)
file:///C:/Users/xzzgb3/Downloads/1056-G1-E-TEC-135-HO-Avalon-2485-Cruise.pdf
Now this Tahoe performance bulletin, I would be very questionable of the results, but it seems its a copy / paste from a Mercury site of someplace
Tahoe LTZ 2485 (25 ' LOA) and running a 4 stroke Mercury 150hp hit 46mph.
So its very possible for a 22' pontoon to hit 40mph with a 150. Just depends on the boat model, weight, tube configuration, tube conditions, weather / wave conditions, etc.
Some of the "hopped up" motors like Merc's pro XS, Yamaha Vmax, Evinrude HO, consistently run on the high side of the allowed HP numbers of 10% above or below the stated HP from the manufacture and are closer to 165hp then the 150hp stated on the cowling. They offer higher operating RPM then standard 150's (Merc's pro XS is 5200-6000 rpm vs standard 150hp of 5000-5800rpm), along with carbon fiber reeds vs stainless steel, solid motor mounts, dome shaped pistons, better ECU mapping, better exhaust tuning, tuned intake intunators, and sometimes even different gear ratios in the lower unit, etc.
I've hit 40+mph on our 2275 RCW with twin 32" elliptical tubes, lifting strakes, waveshield, and light fuel and people in the boat. Is it the normal? Absolutely not. I usually never run with less then 1/2 fuel, 2 people, and no coolers / extra's in the boat. I'm usually in the 36-38mph range with a normal load and ideal sea / weather conditions.
we need to know more about which 22'? how many logs, what pacakage (SPS, ESP, etc.) how many folks are you generally taking out. what are your intended uses (fishing? watersports, daytripping, etc.) where are you boating(offshore, inshore, lakes, what lake)...
give some help and you'll get some better answers.
as written, 9.9 is enough....
and a 22' with any toon config won't hit 40+ with a 150
Now whether you believe these numbers or not, they are published on Yamaha's and others performance bulletins websites.
21 SLX with a overall length of 22', top end is 41.4mph per Yamaha's test page. SPS toon package.
PB_BNT_21SLX_F150XA_2014-10-28_PNT | Yamaha Outboards
yamahaoutboards.com
2274 GLI with a overall length of 22'6" top end is 40.9mph per Yamaha's test page. Twin 32" elips with strakes.
PB_BNT_2274GLi_F150TLR_2010-09-12_PNT | Yamaha Outboards
yamahaoutboards.com
23RSB with a overall length of 25'3" (granted it was a 200hp) and top end was 41.5mph but its a 25 foot boat.
file:///C:/Users/xzzgb3/Downloads/1202-G2-200HP-Bennington-R23-RSFB.pdf
Sweetwater (not a Benny, but at 24'11 inches LOA ) with a Yamaha 150hp had a top end of 40.7mph (triple 25" tubes)
Avalon 2485 (not a Benny, but at 24 ' LOA ) with a 135hp Evinrude HO has a top end of 38mph (HO motor being key here)
file:///C:/Users/xzzgb3/Downloads/1056-G1-E-TEC-135-HO-Avalon-2485-Cruise.pdf
Now this Tahoe performance bulletin, I would be very questionable of the results, but it seems its a copy / paste from a Mercury site of someplace
Tahoe LTZ 2485 (25 ' LOA) and running a 4 stroke Mercury 150hp hit 46mph.
Performance Test | Mercury Boat House Bulletin
performancedata.mercurymarine.com
So its very possible for a 22' pontoon to hit 40mph with a 150. Just depends on the boat model, weight, tube configuration, tube conditions, weather / wave conditions, etc.
Some of the "hopped up" motors like Merc's pro XS, Yamaha Vmax, Evinrude HO, consistently run on the high side of the allowed HP numbers of 10% above or below the stated HP from the manufacture and are closer to 165hp then the 150hp stated on the cowling. They offer higher operating RPM then standard 150's (Merc's pro XS is 5200-6000 rpm vs standard 150hp of 5000-5800rpm), along with carbon fiber reeds vs stainless steel, solid motor mounts, dome shaped pistons, better ECU mapping, better exhaust tuning, tuned intake intunators, and sometimes even different gear ratios in the lower unit, etc.
I've hit 40+mph on our 2275 RCW with twin 32" elliptical tubes, lifting strakes, waveshield, and light fuel and people in the boat. Is it the normal? Absolutely not. I usually never run with less then 1/2 fuel, 2 people, and no coolers / extra's in the boat. I'm usually in the 36-38mph range with a normal load and ideal sea / weather conditions.