towing - engine in neutral?

toadaly

Recruit
Joined
Sep 22, 2024
Messages
2
My brother told me that he was told when he bought a small OB motor that it should always be in neutral when on a boat being towed. The reason being that the wind would make the prop spin and thus turn over the engine and possibly do damage. I often forget to put my 90hp OB in neutral after powering onto trailer after an outing. I can't see wind turning over a 90hp motor, esp. in the raised position so that its not facing the wind dead on. Any opinions?
If you have the main power switch turned off, this is not possible, even if it otherwise theoretically would be.
 

silverbul

Petty Officer 1st Class
Joined
May 19, 2023
Messages
304
put the motor in forward, the wind will spin the prop and give you a boost going home, better gas mileage and 10 miles per hour faster.
 

JimS123

Fleet Admiral
Joined
Jul 27, 2007
Messages
8,162
I won awards for science in High School. It got me a University scholarship. After learning a lot of crap in College, I spent a 45 year career in Engineering.

"For all the crap I learned in High School, it's a wonder I can think at all". LOL...a quote.....not mine.

In any event, there is only one formula (equation) that has served me daily thru all those years.

MCpDeltaT.....

Let's see you apply that to your propeller.
 
Joined
Mar 1, 2005
Messages
956
I often forget to put my 90hp OB in neutral after powering onto trailer after an outing.
To me this is the bigger issue:
#1 - powering onto trailer is harmful to the boat landing
#2 - if your motor doesn't have a safety mechanism to prevent starting in gear, the boat could lurch when you start it.

Solutions:
#1 - don't power load. Use the winch or back further in.
#2 - part of your mental checklist should be to always put the gear in neutral before turning off the motor
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,080
To me this is the bigger issue:
#1 - powering onto trailer is harmful to the boat landing
#2 - if your motor doesn't have a safety mechanism to prevent starting in gear, the boat could lurch when you start it.

Solutions:
#1 - don't power load. Use the winch or back further in.
#2 - part of your mental checklist should be to always put the gear in neutral before turning off the motor
Tilt the motor way out so the prop wash doesn't wash away the bottom of the ramp and you will be fine.
 
Joined
Mar 1, 2005
Messages
956
Tilt the motor way out so the prop wash doesn't wash away the bottom of the ramp and you will be fine.
Sounds good in theory, but most people I've seen never do it. Additionally, your boat is already at an angle so even with tilting your prop is horizontal at best but usually still pointed down at an angle. The prop wash does most of the damage to the ramp bottom, not the propeller itself.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,080
Sounds good in theory, but most people I've seen never do it. Additionally, your boat is already at an angle so even with tilting your prop is horizontal at best but usually still pointed down at an angle. The prop wash does most of the damage to the ramp bottom, not the propeller itself.
Years back the family had a gravel dirt ramp, not fancy but it worked. We power loaded on that ramp for almost 20 years, motor tilted up so prop wash shot up out of the water. Never damaged the ramp after all those years. Correct...many do not tilt their motors up far enough...but the ramps I use for the past 15 years are all concrete for a long way back but shallow ! Can't back in far enough to float the boat on without your vehicle being in the water over the axles. By power loading, I am on my trailer and out of the way faster than anyone else at the ramp so I am not holding up traffic.
 

KJM

Lieutenant
Joined
Jul 31, 2016
Messages
1,265
Power loading isn't a concern where I go, nothing but solid rock below ramp.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,067
Power loading is only a problem on poorly designed or poorly supported boating infrastructure, period.
 
Joined
Mar 1, 2005
Messages
956
Power loading is only a problem on poorly designed or poorly supported boating infrastructure, period.
That is not an accurate statement.

Many lakes have concrete ramps, but the concrete has to end at some point. This is especially the case on northern lakes where ice and freezing/thawing make longer/deeper launches impractical.

Lake bottoms after the launches end can be rock, gravel, sand, mud, etc. Sandy and muddy lake bottoms are the most susceptible to propeller erosion. You can't design and engineer ramps to be propeller-proof. At some point, boat owners need to accept equal responsibility for using bunk trailers and for keeping the boat launches in good shape. Otherwise county and state budgets have to foot the bill, raising taxes, blah blah blah.

White Bear Lake in Minnesota is a great example. There is a great double-launch concrete ramp on the north end. It's a sandy-bottom lake. There is a propeller trench followed by a sandy hump about 10-15ft out that can catch lower units when maneuvering into and out of the launch. The county has had to fix the ramp repeatedly due to the power-loading.

Power loading is a problem in some places whether you want to accept it or not. Boating is not a right, it's a privilege. If you launch somewhere that is immune to the havoc of power-loading, that is great. Most boaters are ignorant of the boat launch conditions and how their actions affect the launches.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,815
I am not sure why " power loading " is even done.----Never did it myself.-----Too much risk of damage to the tow vehicle in my opinion.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,080
I am not sure why " power loading " is even done.----Never did it myself.-----Too much risk of damage to the tow vehicle in my opinion.
Due to torn rotator cuffs and very shallow ramps power loading is necessary for some of us. However I know how to do it properly and do not damage the ramp. If I had to winch my boat on the trailer it would take me 20-30 minutes to get loaded up as it does most folks that winch their boats on. I can power load and be gone in 10 minutes or less. Unfortunately those that power load incorrectly are never challenged by authorities.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,080
That is not an accurate statement.

Many lakes have concrete ramps, but the concrete has to end at some point. This is especially the case on northern lakes where ice and freezing/thawing make longer/deeper launches impractical.

Lake bottoms after the launches end can be rock, gravel, sand, mud, etc. Sandy and muddy lake bottoms are the most susceptible to propeller erosion. You can't design and engineer ramps to be propeller-proof. At some point, boat owners need to accept equal responsibility for using bunk trailers and for keeping the boat launches in good shape. Otherwise county and state budgets have to foot the bill, raising taxes, blah blah blah.

White Bear Lake in Minnesota is a great example. There is a great double-launch concrete ramp on the north end. It's a sandy-bottom lake. There is a propeller trench followed by a sandy hump about 10-15ft out that can catch lower units when maneuvering into and out of the launch. The county has had to fix the ramp repeatedly due to the power-loading.

Power loading is a problem in some places whether you want to accept it or not. Boating is not a right, it's a privilege. If you launch somewhere that is immune to the havoc of power-loading, that is great. Most boaters are ignorant of the boat launch conditions and how their actions affect the launches.
Thais is why I have always said, you should need a license and pass a test to operate a boat !
 
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