How to make a 24’ runabout out of two 20’ boats

Words © by Chris (Seabuddy) Brown

This classic 24’ inboard/outboard boat is waiting for a customer to specify a vee-drive shaft drive in the traditional inboard manner. All the other features and desirable traits of a runabout are in place. She runs, rides, and turns like a gem.

Sold 24' Runabout running

Sold 24′ Runabout running

The Cherubini 24’ was created by the company using their 20’ boat model. As a family, they have been building boats back to 1937. The current boat company goes back to 1975. Over this time they have worked their magic in many ways. This is an article about one of their magic moments in a long history of inspired boat building.

Hand crafted highly detailed and finished wood deck.

Hand crafted highly detailed and finished wood deck.

It looks like they bought the molds and rights to a water jet powered 20’ runabout from an out of business boat builder. They changed that hull to be a stylish, real sweet running I/O boat. Yes, other power is offered from the factory, but all the units seem to use inboard/outboard power.

Powered by stern drive, I / O Mercury Marine big block engine

Powered by stern drive, I / O Mercury Marine big block engine

 

I/O engine room

I/O engine room

I now want to drill down to how they created a 24’ boat. They took TWO examples of their sweet running 20’, cut them down the middle (but on an slant) added 4’ in the center, put this all into one boat and blended all of this using their boat building expertise into a 24’ boat. No flat spots, no seams, nothing that does not pass close inspection. I could not do this. Kudos to them.

Two aft sections and one bow of the 20' runabout, stacked on a trailer

Two aft sections and one bow of the 20′ runabout, stacked on a trailer

BTW, they went from a V-6 Mercury Marine GM block powered 20’ boat to a 496 cu. in. displacment, again Chevy GM block, Mercury Marine engine in the 24’. Both boats run much faster than most true classic boats. The 24’ can top 65 MPH with its big block engine.

prototype 24' runabout hull

prototype 24′ runabout hull

Has this type of thing been done before? Most say, yes. There are plans and drawings for the classic Donzi 16 and the Donzi 22 models. No drawing or plans for the Donzi 18 boat. The story goes that the 16’s bow and aft sections where cut and two feet were added in the middle to make the Donzi 18.

Prototype running under power

Prototype running under power

 

 

 

 

 

 

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