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Drive hight, single engine boat

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Old 11-06-2006, 11:59 AM
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Default Drive hight, single engine boat

On a single engine 25 foot boat with a standard Bravo One drive, what is a good drive hight as mesured from the bottom of the boat up to the cavitation plate?
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Old 11-06-2006, 12:32 PM
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Default Re: Drive hight, single engine boat

Use propshaft depth as your measurement. Most will run best at 3-5" below the bottom.
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Old 11-06-2006, 01:01 PM
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Default Re: Drive hight, single engine boat

OK. That one is a little tricky to measure. Should it be with the drive trimmed so that the propshaft is parallel to the boat bottom?
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Old 11-06-2006, 06:10 PM
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Default Re: Drive hight, single engine boat

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Originally Posted by mats
OK. That one is a little tricky to measure. Should it be with the drive trimmed so that the propshaft is parallel to the boat bottom?

Yes. That would put it at neutral trim.
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Old 11-06-2006, 07:43 PM
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Default Re: Drive hight, single engine boat

3" is high to me but its a place to start. If you start there you can always shim it down. Its a lot cheaper and more accurate than using shorter drives to get it higher.
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Old 11-06-2006, 08:49 PM
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Default Re: Drive hight, single engine boat

I agree, 3" is high.

From your Baja avatar, are you talking a 25 Outlaw???? If so, factory is probably set at about 5" below the bottom. I wouldn't go more than an inch higher than original.
I would also post in the Baja section.
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Old 11-07-2006, 08:49 AM
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Default Re: Drive hight, single engine boat

Are you cutting a new transom hole for your Bravo drive, or...?
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Old 11-07-2006, 01:26 PM
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Default Re: Drive hight, single engine boat

same reason Im gettin a 2" IMCO shorty installed this winter from Doller Offshore.
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Old 11-07-2006, 06:09 PM
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Default Re: Drive hight, single engine boat

Quote:
From your Baja avatar, are you talking a 25 Outlaw????
No, it is a baja 235 Force. I think the bottom to prop shaft distance is close to 8 inches. Compared to your numbers that must be exceptionally deep. Are there any specific reasons that Baja put it that deep in the first place?
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Are you cutting a new transom hole for your Bravo drive, or...?
I was thinking of an IMCO shorty as an easier way to do it....
Thanks for your input
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Old 11-07-2006, 06:48 PM
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Re: Drive hight, single engine boat

I have a baja 24ol my stock height was 7 1/2'' baja's are deep. I went with a 2'' shortie and love it now 5 1/2'' my buddy races a 26sutphen which had a ext box didn't run good so off came the box and then the drive was 4'' it was to high he added 1''spacer now its great, I think smaller than 5'' would work with stepped hulls. when I had the stock height the 3 blades worked better now I use 4 blade trying a 28b1 or 5max this spring through BBLADES program. any help you need let me know. art
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