ToonTail Install Guide

Compatibility

• Designed for Mercury 150–400 HP outboards on pontoon/tritoon setups.
• Mounts to the anti-ventilation plate (or bracket location per kit).
• Clearance required: ensure full steering/trim range without propeller interference.

What’s in the box

• ToonTail main assembly (black finish)
• 316 stainless mounting bracket
• 316 stainless hardware (bolts, washers, nyloc nuts)
• Rubber seal gasket
• Installation overview card

Tools you’ll need

• Socket set & open-end wrenches (metric/SAE per your kit)
• Torque wrench strongly recomended (light-duty range)
• Blue threadlocker included (medium strength)
• Permanent marker to mark origional install placement recomended

Install steps (approx. 3–5 minutes)

1. Prep the area: Disconect Battery, ensure Motor is off and in neutral. Clean and dry the anti-ventilation plate/bracket area.
2. Mock-up: Hold the bracket in place, centered on the engine. Confirm clearance with the prop hub, trim range, and steering. Mounting plate is a "snug" fit by design and may reauire slight force.
3. Bracket alignment: Ensure the plate is square on the motor and clear of the propeller. Plate should mount 1/2 to 1" past motor fin. Mark for future references.
4. Mount the bracket: Install the provided stainless bolts on bottom of plate to create a gap between the plate and motor fin. Install provided rubber seal into gap. Remove bolts from bottom of plate for install in top of plate. Use provided Bolts, washers, and nyloc nuts. Snug them evenly—do not fully torque yet.
5. Final alignment: Sight the outlet so it is parallel to the keel line. Ensure there’s no interference with propeller at full port/starboard and trim up/down.
6. Torque fasteners: Tighten evenly to the hardware spec provided with your kit. (Typical light stainless hardware is often in the low ft-lb range; follow the spec sheet included in your box.)
7. Function check: Turn the wheel lock-to-lock. Trim through the range. Nothing should rub or bind.
8. Lake test: Start with neutral trim. Bring the boat on plane and gradually add power to increase tail height and distance. Check fitment and location promptly after first test
9. Post-test recheck: Inspect all hardware after your first session and again after ~1 hour and 5 hours of use. Repeat all steps if uninstalling and reinstalling for later use.

Tuning & tips

• More height: Add a touch of positive trim at speed.
• Cleaner arc: Keep the outlet level; small angle changes matter.
• Distance vs. height: Neutral-to-slight-negative trim favors distance; positive trim increases height.
• Load sensitivity: Heavier loads/water conditions may require extra trim.

Maintenance

• Rinse after use, especially in brackish/salt water.
• Inspect fasteners after first outing, then every 5 hours.
• Check for any signs of loosening, wear, or interference.

Troubleshooting

• Tail looks low: Add a notch of trim; verify outlet is level.
• Tail is short: Verify speed and load; ensure no obstruction at outlet.
• Vibration/noise: Re-torque hardware; confirm no contact at full trim/steer.