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Part # 9401-7
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Price: $32.95
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Part # 9400-7
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The Attwood Hydro-Stabilizer offers a simple and quick way to boost the performance and efficiency of your outboard or stern drive. This Hydro-Stabilizer quickly planes your boat and reduces drag. It keeps your boat on plane even at lower RPM, improving boat’s efficiency. The black molded wings offer smooth and steady ride and minimize ventilation in turns.

  • Quickly puts boat on plane
  • Keeps boat on plane in lower RPMs

· Black molded wings provide smooth and stable ride

This hydro-stabilizer can be installed on a range of motor models and sizes using the included stainless steel bolts and lock nuts. This hydro-stabilizer comes in two different models.

Features of the Attwood Hydro-Stabilizer

  • Quickly puts boat on plane
  • Minimizes drag when boat goes on plane
  • Black molded plastic wings
  • Puts boat on plane even at lower RPMs

· Wings offer smooth, steady ride and minimizes ventilation in turns

· Easily installs on range motor models and sizes

· Includes stainless bolts and locking nuts for installation

  • Available in two models


Manf. Part # 9401-7

  • Application: Outboards under 50 horsepower

Manf. Part # 9400-7

· Application: Outboards and stern drives 50 HP and above

Average Customer Review for Hydro Stabilizer 9400-7 - Attwood
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Major Improvement
by Colgan from Arkansas City, Kansas on August 13, 2013
The stabilizer is great at reducing bow rise, mine personally by around 40%. Prior to installation my boat would not maintain plane under 12 mph, now I am able to hold plane down to about 8.5 mph while pulling a tube with two younger children. I did not notice any top end speed changes. Only thing I did not like was that in a white capping lake the back end of the boat would occasionally pull some with the undercurrent while on plane now. it was not violent or scary by any means just something to be aware of. I would definitely buy this product again. My boat is an 88 Larson 18 foot bow rider with 175 horse mercruiser, I run a 21 pitch stainless 3 blade prop no other mods on boat.
(7 of 7 people found this review helpful)
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by James from Charlestown, Rhode Island on August 02, 2011
Serves duty purchased for.
(3 of 15 people found this review helpful)
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Will this fit a mercury 40hp 2 stroke?
This is recommended for outboards under 50 HP. So yes it should work.

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