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Archive for outboard

The Leash patent application was published by USPTO

The Leash, a tether for large outboard motors, entered the market in early 2016. They especially focus on preventing bass boat outboard motors from entering the boat after striking a floating, submerged, or fixed object. Their patent application was filed 22 December 2015 and published 18 months later on 22 June 2017 by the U.S. […]

Brunswick follows our lead, patents active trim cylinder US Patent 9,290,252

In December 2013 we published a report, Approaches to Prevent Outboard Motors From Flipping Into Boats After Striking Floating or Submerged Objects in which we identified several ways to prevent outboard motors from breaking off and flipping into boats after striking submerged objects. One of those was was active trim control (see pages 33-34 of […]

On The Escape of Tigers: Haddon & Bass Boat Propeller Safety

In 1970, William Haddon, Jr. a well known safety expert published a ground breaking safety article:   On The Escape of Tigers: an Ecological Note. by William Haddon, Jr. American Journal of Public Health. December 1970. Vol.60. No.12. Pages 2229-2234. The the article has since been widely republished and reprinted. The thesis of the article […]

Warnings for outboard motor can flip into boat

Bombardier and Mercury Marine outboard operators manuals have long warned parts of or all of an outboard motor may enter the boat after striking a submerged object. An example from the 2012 250 horsepower Evinrude E-tec manual is shown at right. A big thanks to Bombardier Recreational Products & Vehicles (BRP) for putting their operators […]

Design Chart for Preventing Outboard Motors From Entering Boats

We charted the the Design Flow Process designing outboard motors in a manner that prevents them from entering the boat after striking submerged objects. The chart was designed specifically with tournament bass boat outboard motors in mind. The chart has since been updated since it was originally posted. The most recent version is below.

Bass boat outboard motors should be fail-safe impact tested

Most major outboard manufacturers conduct a log strike test on new outboard models to prove durability. Manufacturers either test them on the water by actually running over a log of a given type, diameter, and length, or on a test stand they think simulates on water testing. These impact tests are typically conducted at a […]

New Category – Outboard Motor Broke Off & Flipped Into Boat

Numerous previous posts concerned outboard motors striking submerged objects, breaking off, and flipping into boats, preventing or mitigating those accidents, log strike systems, accidents and legal trials involving such accidents and related topics. We will now be covering this topic in this category of the PropellerSafety blog. If anyone wonders why we are covering these […]

Updated Outboard Motor broke off & flipped into boat lists

We updated our Outboard Motor Struck Submerged Object and Flipped Into Boat list today (2 May 2016). We still have many more to add to the list above plus the 2015 U.S. Coast Guard Boating Accident Report Database (BARD) will be out with more soon as well. We also updated our list of Bass Boat […]

Bass Boat Outboard Motors Struck Submerged Object, Flipped into Boat: a List

Back in February 2012 we developed a list of outboard motors striking submerged objects, breaking off, and flipping into boats. We instantly noted a large percentage of these accidents involve bass boats with high horsepower outboard motors. We have since identified 21 occurring since February 2012, plus several earlier ones. Many of the accidents we […]

Our List of Outboard Motors Flipping Into Boats Was Updated 2 June 2014

We updated list of boat accidents on our Outboard Motor Struck Submerged Object and Flipped Into Boat page today (2 June 2014). The updates included one 2002 accident, several 2013 accidents from the recently released USCG 2013 Public Boating Accident Report Database (BARD), and the recent Todd Iwamoto and Rex Chambers accidents. We also added […]