[chapparal]

I Have A Stern Drive Technologies, Mounted On My Chapparal, Not My Choice This Is How It Was Purchased, So Basically I Got Ripped Off From The Guy I Bought The Boat From Ive Found Out That He Has Lied About Almost All Aspects Of The Boat.

My Question For The Forum Is This, What Is The Gear Ratio Of That Drive Where Are Numbers You Need To Help Me Figure Out This System, The Boat Came Factory With A Bravo One Drive, And A Factory 454 Both F Which Are Gone, They Replace Engine With A 350, Which Im Stroking At First Chance I Can Get To Perform The

[TilliamWe]

Okay, first off, the boat company's name is spelled Chaparral.
Second, it's a Sterndrive Engineering SEI 116. That is a direct replacement for a Mercruiser Alpha One Gen 2 drive. And don't be mad about that outdrive, it's not a bad drive. The new ones even come with a 3 year no fault warranty. How old is the drive?????
Why they replaced it with that, I don't know? Well I do know, and SEI 116 is $1395, and you can't get a new Bravo one for less that $3500. But they had to change the transom plate and everything. But anyway, that ship has sailed. It is most likely a 1.47 ratio drive. That's what a 350 in that boat would have gotten when it was new. And the original 454/B1 would have been a 1.50 ratio.
As a note, my sister bought a 90 2350SX cuddy with a 454/B1 combo. And the 454 took a dump. My dad installed a 383MAG MPI from Mercruiser Remanufacturing and it does a Great job. So if you modify your 350, I'd bore it .030 over and put in a 400 crank and make it a 383. or just buy one of those from Mercruiser, but they aren't cheap!
Best of luck to you.