Wanting to know if motor is big enough for 22ft Aluminum deckboat

[shackle101]

So I currently have an old 225hp Evinrude 2 stroke on my 1994 22 foot v hull aluminum lowe deck boat. I don't know the exact weight, but it's 22ft by almost 8 foot wide in the center. I was thinking about getting a 2003 Suzuki DF140 four stroke for better gas milage & no mixing. My question is will this be big enough to push her? I plan to play (tubing/skiing) and we could have up to 6 people in the boat. I assume Aluminum is a bit lighter then fiberglass but I could be wrong. Any suggestions would be nice. I was thinking it would prob be best to have at least 200hp engine to get the power I want, but can't seem to find a four stroke one used.

Thanks!

 

[shackle101]

Anyone? I know on suzuki's website it was claiming to get pontoons up to 40 mph, but I assume with just 1 person. I figure with the v hull it should do even better and it's 1800 lbs according to nada guide.

 

[Bob_VT]

Aluminum hulls are lighter then fiberglass but, they are slower too. Going to a 140 "might" work but there will be a significant performance decrease and if you use it for watersports you will be disappointed. The Suzuki is a great motor and remember the rule of thumb is to have at least 75% of the rated HP or more for a hull to perform properly

 

[shackle101]

Well according to the sticker on the it came with a 120hp (and that's what it's rated for) so I would likely need a 180-200hp then or you saying within 75% of 120hp? The 225 replaced the original before I got it. Yes I would like to use the boat as most people do Hybrid boat for party/fishing/Water sports (mostly tubing). I would like to do some wakeboarding as well but nothing too serious in that regards.

 

[crb478]

If it is rated for a 120 then a 120 will move it just fine, but no where near the 225. Is the 140 a four cylinder? If so you would probably be happier with a 150 6 cylinder to stay closer to what you already have. Just remember you are already over powered and will be with any engine bigger than a 120

 

[shackle101]

Yeah only thing is I don't think a 120 would push it like I want it to go The previous owners put a 225 on it for that reason. I suspect at 140-150 should do well if I put in a 4 blade prop. Really don't need it to go anymore then about 35-40 mph just need a decent hole shot. Thanks for the input guys I haven't got the Suzuki yet but I'm considering it. It's a four cylinder I believe.

 

[steelespike]

What is the wot rpm and gps speed with the 225?
In 94 I could only find 22 ft rated for 70 hp
If we go to a 93 there is a 2200QR rated at 115 and weighs 2200 lbs.
A 140 should work but will need to be propped right.
I believe there are at least 3 companies making direct injected 2 strokes.
The 2 stroke will give you stronger hole shot. May be lighter,
has fewer moving parts and fewer and less complicated service intervals.

 

[shackle101]

Thanks for the input. I'm not exactly sure on RPM on the 225 but it seemed normal last time I was out. As for speed I was told it could get up to 60mph with the 225 via gps. When I was out it felt like 40 or so with around 7 people. Yeah I want go the 4stroke route cause the gas mileage and no mixing. I hear these Suzuki's are actually pretty good as far as reliability and what not.

Not sure how 70hp would work if you have 4-5+ people and wanting to use the boat to play with. I assume those boats are more so designed for cruising. This one certainly does say it's rated for 120hp, but that engine blew up & the previous owners wanted more power (don't we all lol)

Thanks!

What is the wot rpm and gps speed with the 225?
In 94 I could only find 22 ft rated for 70 hp
If we go to a 93 there is a 2200QR rated at 115 and weighs 2200 lbs.
A 140 should work but will need to be propped right.
I believe there are at least 3 companies making direct injected 2 strokes.
The 2 stroke will give you stronger hole shot. May be lighter,
has fewer moving parts and fewer and less complicated service intervals.

 

[jakedaawg]

I may be interested in the old engine if you re-power.

 

[shackle101]

I may be interested in the old engine if you re-power.

I'm certain I will eventually. Where are you located? I'm in Greenville, SC.