4.7m (15ft) Boat Trailer

Rear Keel Roller Setup

 

The rear keel roller is in a fixed position and its primary use is to assist in launching and retrieving the boat and not as a support roller when trailering.

This roller tends to take the hardest of knocks being the first and last point of contact with the boat, so a good secure mount to the trailer is required.

Fit the roller loosely to the U bracket (either MK10 roller or 6" (150mm) self centering/cotton reel roller and corresponding U bracket) and position the bracket centrally with the rear cross member. Angle/tilt the U Bracket back to allow good clearance between the roller and the crossmember - around 20 degrees from vertical and 5-10mm gap is ideal.

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Tack weld the U bracket in position and check the bracket is level with the trailer.

 

Measure between the bottom of the cross member and the rear underside of the U bracket for the U bracket brace. Cut a section of 50 x 6 flatbar to fit and weld in position.

Fully weld the U bracket and brace to the cross member.

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The U bracket brace plate can sometimes be used for fitting an outboard motor support brace. Drill an oversize hole centrally in the brace plate to suit the outboard support brace dimensions.

4.7m Boat Trailer Plan

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