Outboard Motor Brackets - SailNet Community
 
LinkBack Thread Tools
post #1 of 1 Old 09-04-2002 Thread Starter
Contributing Authors
 
Join Date: Jan 2000
Posts: 536
Thanks: 0
Thanked 8 Times in 6 Posts
Rep Power: 16
 
Outboard Motor Brackets

If a pull-up outboard motor bracket is rated for a 20-hp, two-cycle motor, then why couldn't it handle a 9.9-hp four-cycle engine?

Sue & Larry respond:
In the past, brackets for outboard motors were categorized according to the horsepower and weight that they could safely handle. That was in the days when there were only two-stroke engines. Today, four-stroke engines are becoming more and more popular. These engines are larger in size and weigh considerably more than their two-stroke counterparts.

So, when sizing an outboard bracket for a four-stroke engine there is more to consider than just weight, size, and horsepower. Four-stroke engines produce much greater torque than a similar sized two-stroke engines. For this reason, along with the greater weight, manufacturers have found it necessary to beef up their motor brackets.

The weight of a 9.9 hp four-stroke engine is approximately the same as that of a 20-hp, two-stroke, so based simply upon weight, you’re already at the upper end of the bracket’s capacity. Not knowing the exact torque of these two engines, we feel that you’d be best served to follow the manufacturer’s suggestion. And, apart from all the other reasons, it’s always more difficult to use a motor bracket for lifting and lowering when you’re at the upper end of its designed capacity. Good luck to you.

Sue & Larry is offline  
Closed Thread

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is Off
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome