21 seacraft repower question

[flownzie]

about to repower our 21 open fisherman. we currently have a 225 EFI on it and we are thinking about going w/ a 175 HP etech. does anyone have opinions re: ideally HP for a 2-stroke repower?

 

[tashasdaddy]

Re: 21 seacraft repower question

what is the boat rated for?

 

[dingbat]

Re: 21 seacraft repower question

"Classic" Seacraft or a new one?

Not sure why your dropping down in HP. A smaller motor doesn't necessarily translate into better fuel mileage. According to the performance bulletins my boat gets better fuel economy running a F250 than it does an F200

 

[steelespike]

Re: 21 seacraft repower question

Usually the minimum recommended is 75% of the rated hp.Keep in mind few ever say boy I wish I had less horse power.
All the Etecs in that block are about 427 lbs.I think the efi 225 is about
580.Thats a nice chunk off the transom.Generally a 2 stroke has a stronger hole shot.If you were to get the 200 you could cruise at the 175s speed
and the 200 would be loafing.I feel the highest hp in a given block gets the best gph(gallons per hour) per hp.

 

[dingbat]

Re: 21 seacraft repower question

All the Etecs in that block are about 427 lbs.
I think the efi 225 is about 580.Thats a nice chunk off the transom.Generally a 2 stroke has a stronger hole shot.

The Merc 225 Efi weighs in at 479 lbs.

 

[gss036]

Re: 21 seacraft repower question

I did not think SeaCraft made a 21 ft, I thought they went from 20 to 23 ft as I have a 23WA SeaCraft and just recently went from a 200 hp Merc to a 225 HP Honda, which is 200 lbs heavier and didn't notice any real difference in the weight. It seemed to handle the extra weight, so I don't think that would be a major concern for you.
Go over to http://www.classicseacraft.com/forum/ubbthreads.php
and post. I am sure you will get some solid answers there.

 

[ricwing]

Re: 21 seacraft repower question

I own a 99 21 seacraft,it has a merc 225 4 stk., it cruises 4000 rpm 35-40 and 58 wot not loaded down. Its a heavy motor 583 lbs and the boat sets low in back. In fact with 2 people fishing in back water will come in through the scuppers. I would not go below 200 hp and stay with a lighter 2 stroke.