Slow speed while motoring - SailNet Community
 2Likes
  • 2 Post By Close Quarters
 
LinkBack Thread Tools
post #1 of 8 Old 03-22-2014 Thread Starter
Junior Member
 
Close Quarters's Avatar
 
Join Date: Feb 2012
Location: SE Louisiana
Posts: 7
Thanks: 6
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Slow speed while motoring

Hello!

1st time going out this season and I have very low speed in forward. Reverse is fine. In fact I go faster in reverse than forward. Over the winter, I would run the engine 30 minutes a week. 10 in neutral. 10 in forward. 10 in reverse. A month ago I started noticing I could only get 2200 RPM's in forward but I never go any higher than that but I still thought it strange. Certainly could achieve higher in rev and neutral.

My boat is a Pearson 323 with a rather new universal M-25XPB with 240 hours and the ZF 15 MIV transmission. My bilge is generally clear but today noticed it had a brownish orange discoloration with a slight foam on top. Not much actually more like a slight skim.

Kinda new to this so not real sure where to start. Hoping it's something simple but probably not knowing my luck.

Any suggestions, tips or hints would be greatly appreciated!

Cheers!

Bob
Close Quarters is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 8 Old 03-22-2014
Senior Member
 
Lake Superior Sailor's Avatar
 
Join Date: Aug 2011
Location: Eagle River Wi.
Posts: 1,006
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 5
 
Re: Slow speed while motoring

Pretty hard to say much without more information......Dale

Reluctant Lady
Cal 28, 1967
Lake Superior
Where God got it done!
Lake Superior Sailor is offline  
Quote Quick Reply Share with Facebook
post #3 of 8 Old 03-22-2014
Sea Sprite 23 #110 (20)
 
mad_machine's Avatar
 
Join Date: Dec 2012
Location: Atlantic City, NJ
Posts: 3,217
Thanks: 5
Thanked 69 Times in 60 Posts
Rep Power: 3
 
Re: Slow speed while motoring

can you check the fluid in your transmission? Regular oil in water turns whitish.. but transmission fluid keeps a reddish to pinkish colour like this.


Art Haberland
__________________

In the end all that matters is how fully you loved, how gently you lived, and how gracefully you let go of things that did not belong to you -Buddha

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mad_machine is offline  
Quote Quick Reply Share with Facebook
post #4 of 8 Old 03-23-2014
Senior Member
 
JimsCAL's Avatar
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,884
Thanks: 2
Thanked 76 Times in 70 Posts
Rep Power: 9
 
Re: Slow speed while motoring

Are you running the engine in your slip or underway? if the former, I would expect lower RPMs. If the latter, what speed are you making in forward? Sounds like there was a recent change. Could just be an issue with the throttle cable.

As to the stuff in you bilge, could be a number of things. Certainly check the oil levels in the engine and transmission.
JimsCAL is offline  
Quote Quick Reply Share with Facebook
post #5 of 8 Old 03-24-2014
Senior Member
 
BarryL's Avatar
 
Join Date: Aug 2003
Location: Long Island, NY
Posts: 1,821
Thanks: 4
Thanked 50 Times in 45 Posts
Rep Power: 13
 
Re: Slow speed while motoring

Hey,

Has the prop and bottom been cleaned recently? A typical result of a dirty prop and bottom is slow motoring performance.

Can you at least verify that prop is clean?

Good luck,
Barry

Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BarryL is offline  
Quote Quick Reply Share with Facebook
post #6 of 8 Old 03-31-2014 Thread Starter
Junior Member
 
Close Quarters's Avatar
 
Join Date: Feb 2012
Location: SE Louisiana
Posts: 7
Thanks: 6
Thanked 0 Times in 0 Posts
Rep Power: 0
 
And the winner is. . .

Barnacles! ! !

Diver did the trick and everything is running well! Thanks for all the help!

Bob
Fstbttms and jimgo like this.
Close Quarters is offline  
Quote Quick Reply Share with Facebook
post #7 of 8 Old 04-01-2014
Senior Member
 
Join Date: Mar 2012
Posts: 664
Thanks: 27
Thanked 25 Times in 24 Posts
Rep Power: 4
 
Re: Slow speed while motoring

Check your prop pitch.
barefootnavigator is offline  
Quote Quick Reply Share with Facebook
post #8 of 8 Old 04-01-2014
Senior Member
 
gamayun's Avatar
 
Join Date: Aug 2009
Location: San Francisco
Posts: 561
Thanks: 17
Thanked 28 Times in 28 Posts
Rep Power: 7
 
Re: Slow speed while motoring

It sounds like you've identified the problem, but I'd like to throw out one more thing that completely surprised me. I'd never been able to get full RPM out of my engine since I bought the boat last year. Thought it was an engine issue because the prop is original and the bottom is clean. The throttle cable broke a couple of weeks ago and when hooking it back up to the throttle handle, it had been installed wrong some time before, which meant that the idle position was OK, but it couldn't reach the upper limits. Obviously, a bad PO fix. The engine runs great, hits max RMP, and is burning off some white smoke these days....
gamayun is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Cape Dory 30 - How slow is "slow?" john2510 Boat Review and Purchase Forum 22 12-18-2012 02:21 PM
Slow, slow, slow and menu not responding cupper3 SailNet FAQ 35 05-05-2012 06:30 AM
C&C 99 motoring speed and a few others BarryL Boat Review and Purchase Forum 19 01-27-2011 04:18 PM
Gemini 105MC Slow speed under power TexasWill Boat Review and Purchase Forum 81 07-26-2010 10:26 PM
How slow is too slow before you use the motor? FarCry General Discussion (sailing related) 30 10-07-2008 01:09 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

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