1994 Outrage 21 single engine shaft length

Optimizing the performance of Boston Whaler boats
nwwhalerguy
Posts: 11
Joined: Fri Mar 17, 2017 3:58 pm

1994 Outrage 21 single engine shaft length

Postby nwwhalerguy » Fri Aug 20, 2021 3:56 pm

What is the standard single-engine shaft length for a 21 Outrage 1993 to 1997?

jimh
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Location: Michigan, Lower Peninsula
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Re: 1994 Outrage 21 single engine shaft length

Postby jimh » Fri Aug 20, 2021 5:33 pm

According to the 1994 catalogue, the c.1994 21-foot OUTRAGE had a standard notched transom that would use a 25-inch shaft single engine, but there was an option for a 30-inch transom height that would use a 30-inch-shaft-length single engine or 25-inch-inch-shaft-length twin engines.

The correct engine shaft length for a single engine on a c.1994 21 OUTRAGE would then depend on which transom option was used on a particular boat.

The general Boston Whaler configuration for engine shaft length has been to use 25-inch-shaft engines for single engine, and 20-inch-shaft engines for twin engines. An exception is the Whaler Drive, which uses 25-inch-shaft engines for both single and twin engine. There are a few models that used 30-inch-shaft length for single engines and 25-inch-shaft-length for twin engines.

nwwhalerguy
Posts: 11
Joined: Fri Mar 17, 2017 3:58 pm

Re: 1994 Outrage 21 single engine shaft length

Postby nwwhalerguy » Fri Aug 20, 2021 5:59 pm

Thanks Jim. I think you answered my question.

'94 WHALER TRANSOM.JPG
Fig. 1. Transom of the OUTRAGE 21 boat under discussion showing a notched transom.
'94 WHALER TRANSOM.JPG (120.93 KiB) Viewed 4292 times


Per the attached photo I'm going with [the assumption of] a notched transom. A two-engine setup on that boat would be 20-inch shaft engine.