SailNet Community - Reply to Topic
Thread: Bigger boat outboard Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

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.



  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
05-25-2010 12:16 PM
joshw5144 Thanks for the input guys. I guess I'll stick to my dielsel.
05-21-2010 05:10 PM
blt2ski I was going to say idle speed is set too high, OR, the prop is pitched incorrectly. Not that I know props and how they work, but too much pitch? I believe would potentially be the issue.

For trolling, 3-5 hp motor would work. You will not need 10HP to go 2-4 knots in reasonably smooth water. Throw some seas into the mess, along with some current, not we need more like 5-10 minimum, and you might as well use the diesel for these conditions.

marty
05-21-2010 04:34 PM
dabnis Josh,

I had a commercial salmon troller with a Detroit Diesel, aka "Jimmie", used to troll for hours on end with no problems. Lots of theories on this issue but I think as long as the engine is run hard after trolling it should be OK. lots of commercial boats with 2 and 4 stroke diesels out there doing the same thing for many years. Perhaps your idle speed is set too high if you are going too fast?

Dabnis
05-21-2010 04:05 PM
joshw5144
Quote:
Originally Posted by FSMike View Post
I would imagine that 10hp would be adequate for pushing your boat at 3-4 knots in calm conditions. Offset installation shouldn't make any appreciable difference for trolling. Why don't you want to use the diesel?
Better yet, why not sail whenever possible?
I do sail when appropriate, but sometimes due to lack of/direction of wind or confinded spaces I need to use the engine. I don't really like to use the main engine because it goes to fast most times, which means in and out of gear every minute or so. And when its not to fast it's just at an idle which I don't like to leave it at for hours.
05-21-2010 03:45 PM
FSMike I would imagine that 10hp would be adequate for pushing your boat at 3-4 knots in calm conditions. Offset installation shouldn't make any appreciable difference for trolling. Why don't you want to use the diesel?
Better yet, why not sail whenever possible?
05-21-2010 02:58 PM
joshw5144
Bigger boat outboard

Hi All,
I was wondering if anyone would know how to calculate the amount of horsepower I would need to move my boat. I have a 34' Hunter, with an inboard diesel, but I am looking to add an outboard for trolling (kicker?). I would only need to move at 3-4 kts max. But more often around 2 kts.. Right now I use my diesel, but I hat leaving it at 1500 rpm for any amount of time. Also could it be offset on the transom or would that cause steering issues? Any input is appreciated. Thanks.

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

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