Repowering 23' with 2-75 hp 4strokes

[PURSUIT2350]

I need to repower my 23 ft pursuit and found a pair of mercury 75 hp 4 strokes (ot538858). Also they are short and need to be converted to xlong (25") <br /><br />I would like to hear from people who have reporwered with low hp 4 strokes. I dont need much speed but I need to plane. Also, does anyone know about how to change it to xlong?<br /><br />I went through a manual and looks like a 1000 dollar (perts) per motor investment.

 

[Perfidiajoe]

Re: Repowering 23' with 2-75 hp 4strokes

I must ask ........why? A lot of expense, a lot of work, to what end? I don't know anything about how much you're paying for these 75's, or condition or age, but there are so many other possibilities. One 25" 150 should be more efficient, w/ only 1 lower unit in the water, & less weight, not to mention less parts, maintenance, etc. Why? IMHO, Joe

 

[PURSUIT2350]

Re: Repowering 23' with 2-75 hp 4strokes

The 4 strokes have not been used other than briefly installed in a 17footer that couldn't take the weigh. I am getting them quite cheap (7k for the pair).

 

[Perfidiajoe]

Re: Repowering 23' with 2-75 hp 4strokes

Quite cheap? By your calculations $9000. to repower with these, & a lot of work. Maybe it's just me, but I think you can do better. Do you have to have 4 strokes? Do you have to have duals? I hope some one else can show me how this is a good deal for you. I don't mean to be presumtious, but for 9 grand there's a lot out there, with a lot less work. IMHO, Joe

 

[PURSUIT2350]

Re: Repowering 23' with 2-75 hp 4strokes

I am open to suggestions. I prefer duals for offshore fishing. <br /><br />Thanks for your input.

 

[steamboatwilly]

Re: Repowering 23' with 2-75 hp 4strokes

Good evening PURSUIT2350,,,You asked for suggestions,I kindly go along with Perfidiajoe.Seems to me like you could find a pretty good 150 or 175 for that much.Would one 2stroke not be cheaper maintenance than two 4strokes?I have a 89-150 two-stroke,I wouldnt be afraid to head out for Kuwait City.You could always find a small kicker.Ive read a lot of arguements on preferences on 2 verses 4 motors.I guess everybody has to deside for themselves.Speaking for myself only,I wouldnt give a two-stroke for three four-strokes.BYE.

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

as long as the 75's are powerfull enough, a twin motor setup is a far better offshore rig than one big engine, but, as mentioned there is twice the maintenance, I have had twin engines for years and would never swap back to one.

 

[Perfidiajoe]

Re: Repowering 23' with 2-75 hp 4strokes

You can check the opening page of "I Boats" click on outboards for sale. or check on line. Duals are nice, but I have found that most problems I have encountered were fuel related, so unless you have seperate fuel tanks, filled from different stations, if one engine developed a problem the other was soon to follow. Also as I said before one 150 HP weighs less, rigs easier, runs cheaper, & will get you more speed than 2 75 HP motors. I know you said speed is not an issue, but it is nice to have when you need it, & I never heard anyone complain they can go too fast. You will see when you load the boat with fishing gear coolers, ice, food, fuel, passengers, etc. you may want more HP than you have. The direct injected 2 strokes are pertty clean, & pretty efficent engines. So look around, don't be drawn in by the 4 stroke hype, they're good, but not the end all of engines. Shop, make phone calls, go to dealers, look on line. It's that time of year, end of season, they are stuck with inventory, & high gas prices, keeping people away, But you will never be stuck with your money! Go look, Have Fun, Talk to lots of folks, SHOP. Good Luck, Joe

 

[peterc38]

Re: Repowering 23' with 2-75 hp 4strokes

Aside from the shaft length and single versus twins debate I think it is likely at 150 HP you will be grossly underpowered. You don't list any specs on the boat such as weight and deadrise. A new 22 ft Pursuit CC has a dry hull weight around 3,000 .lbs, and is rigged with a 200 HP engine as standard power. I assume a 23 footer is heavier and therefore has a higher horsepower rating. There is a 2350 for sale on the net with twin 150's on it. You say you only need to plane, yet you also say you want to go offshore. IMO those may be conflicting goals. Offshore is no place to mess around in an underpowered boat. What is the boat rated for in regards to horsepower? You should have at least 75-80% of the max HP be it twins or a single w/ a kicker.<br /><br />My $.02

 

[ob15]

Re: Repowering 23' with 2-75 hp 4strokes

I agreee with Peter_in_Maine. Sounds like the boat will be way underpowered. Twin 100's would probably be borderline.

 

[WillyBWright]

Re: Repowering 23' with 2-75 hp 4strokes

If that's a V-bottom you may need those to be just longshafts. XLs may be too long since they're not installed in the middle as a single motor would. A foot off-center may be about 20". Besides there is no extension kit for any 4-stroke that I'm aware of.

 

[Solittle]

Re: Repowering 23' with 2-75 hp 4strokes

I have a 23' CC with twin 110 hp OMC V4s. I am a big fan of twins and have had to come home on one a couple of times - - I on occasion will run off shore and have a degree of comfort in knowing that one engine will get me home.<br /><br />I also cast my vote with Peter that twin 75s just won't cut it with your rig. With any kind of load you may not even get up on plane.

 

[PURSUIT2350]

Re: Repowering 23' with 2-75 hp 4strokes

I should have said that I had twin 120hp 86 evinrudes before and having a pair paid off. <br />Seems like everyone agrees that 2-75hp 4 strokes won't do it. <br /><br />The lower cost alternative here is a new pair of two cycles(115 to 150hp) Mariners EFI. Any idea about their consumption rate. <br /><br />What I used to burn trolling for Mahi and Wahoo here, 50-60 gals per day, has turned into a steep investment. I've heard that the EFI should burn near 60% in comparison with the ol evinrudes. <br /><br />Any comments?

 

[phatmanmike]

Re: Repowering 23' with 2-75 hp 4strokes

do they have e-tec's down there?<br /><br /><br />evinrude.com

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

on the trolling thing, with some modern day 2 strokes 60 gallons you could troll to another country, I have a pair of 115 Fichts and they use next to nothing at trolling revs (about 1500RPM)

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

I also had a pair of 120 V4 evinrudes before I swapped to the 115 Fichts, I did a post a while ago on a comparison between the two if you want to do a search for it.

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

search for 120 looper to 115 ficht

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

I also had a pair of 120 V4 evinrudes before I swapped to the 115 Fichts, I did a post a while ago on a comparison between the two if you want to do a search for it.

 

[noelm]

Re: Repowering 23' with 2-75 hp 4strokes

holy crap whats happened here, a double post with one in the middle, don't know how that happened!

 

[BillP]

Re: Repowering 23' with 2-75 hp 4strokes

I have 100s of hrs offshore in a 2350 Pursuit with twin 130s Yamaha 2 strokes. 150hp is marginal inshore but offshore that's about all you need if the seas are 4' or more. You just can't run fast offshore unless you want to break bones. The minimum I'd put on the boat would be 200hp and it would be with modern 2 strokes. IF you maintain per specs and use a dealer, check the scheduled maintenance cost on a 2 stroke vs a 4 stroke. 4 strokes are big bucks compared to 2 strokes unless you do the work yourself. I've owned a 4 stroke for almost 10 yrs and developed a severe dislike for adjusting valves and changing oil/filter when compared to 2 stroke maintenance.