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A trolling plate assembly includes a plate structure pivotally carried on a supporting bracket on a propulsion unit. The plate structure is spring biased toward a downward or deployed position. Ears on the plate structure provide tracks on which followers are entrained with the followers seating in

A trolling plate assembly includes a plate structure pivotally carried on a supporting bracket on a propulsion unit. The plate structure is spring biased toward a downward or deployed position. Ears on the plate structure provide tracks on which followers are entrained with the followers seating in recesses at the end of each track to retain the plate structure horizontal. The rollers are biased into track and into recess engagement. A control permits the user to disengage the rollers from the recesses to allow downward deployment of the plate structure. A modified trolling plate includes a pair of adjustably biased rollers each for rolling contact with a trolling plate ear for seating in multiple recesses therein. Each recess is associated with a different plate position.

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[ I claim:] [1.] A trolling palte assembly for installation on a boat propulsion unit, said plate assembly comprising,a bracket attachable to the propulsion unit,a trolling plate structure,pivot means coupling said plate structure to said bracket permitting the plate structure to move to an upright

[ I claim:] [1.] A trolling palte assembly for installation on a boat propulsion unit, said plate assembly comprising,a bracket attachable to the propulsion unit,a trolling plate structure,pivot means coupling said plate structure to said bracket permitting the plate structure to move to an upright positon to disrupt backwash from the propulsion unit,spring means acting on said plate structure to urge same to the upright position,said plate structure having ears thereon each having a curved track and a recess therein,follower means including rollers separately entrained on each of said tracks for travel therealong toward said recess during plate structure travel about said pivot means between the upright position and a raised horizontal position,means biasing each of said rollers toward said tracks and into said recess to lock the trolling plate in a horizontal position, andpositioning means for displacing said rollers away from each said recess to permit upright positioning of the plate structure by said spring means.