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Forum: Recovered Threads

07-26-2022, 02:58 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

As an update, I tried the REV4 17 pitch and lost...

As an update, I tried the REV4 17 pitch and lost 6mph and 500rpm. It certainly held a lot better, but the loss in performance is too much. I'm thinking of trying Bigshrimpin's suggestion and going...

Forum: Recovered Threads

12-12-2021, 09:55 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Well I raised the motor a hole and rpms increased...

Well I raised the motor a hole and rpms increased to 5,600, but speed stayed around the same. Still running the mirage plus 17 pitch.

Seeing as it's frustrating the prop will ventilate when...

Forum: Recovered Threads

04-04-2021, 06:28 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

I should mention, I've been noticing the prop...

I should mention, I've been noticing the prop sometimes partially breaks free even when I'm going in a straight line and increase rpms. The prop shaft seems straight, so I'm not sure why this would...

Forum: Recovered Threads

03-18-2021, 09:59 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Thanks Bigshrimpin (as well as all the others)...

Thanks Bigshrimpin (as well as all the others) for all of the advise, you have been incredibly helpful! Hopefully in a couple weeks I'll have it all dialed in and will report back to you guys.

Forum: Recovered Threads

03-17-2021, 10:39 AM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

I don't think weight is an issue (the boat was...

I don't think weight is an issue (the boat was fully rebuilt), but it does have a large t-top. That and the fact that the engine could still go up 2 holes probably.

BTW, going by your picture,...

Forum: Recovered Threads

03-16-2021, 05:04 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Actually I looked through my collection of...

Actually I looked through my collection of Mercury brochures, and the first year of the 3 liter the 225 carb (1994 year) had a ratio of 1.64 to 1. After that, all of them (even the ones being made...

Forum: Recovered Threads

03-16-2021, 02:56 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Makes sense... which begs the question (for...

Makes sense... which begs the question (for Bigshrimpin): what year was your Merc 225?

Forum: Recovered Threads

03-16-2021, 02:17 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

How can it be that your 225hp motor turned a prop...

How can it be that your 225hp motor turned a prop at 5800 rpm when my 250 can only turn and easier-to-turn prop at 5,400 rpm? Is there something wrong with my motor?

Forum: Recovered Threads

03-15-2021, 07:05 PM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Appreciate the reply! I'm shooting for a prop...

Appreciate the reply! I'm shooting for a prop that gets me to at least 5,600rpm, and doesn't blow out. Good hole shot is a strong plus, as well as high cruising and top end speed.

What rpms were...

Forum: Recovered Threads

03-15-2021, 08:54 AM

Replies: 24

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Views: 484

Posted By rdoaner123

Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

Hello,

Does anyone have any suggestions for this setup? The SeaCraft is a 1978, and the Merc 250 EFI Offshore is from 1996.

I'm currently running a 17 pitch Mirage Plus, and am only getting...

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