Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > General Interest

Reply
 
Thread Tools Display Modes
  #1   IP: 137.103.82.227
Old 05-18-2020, 08:12 AM
joe_db's Avatar
joe_db joe_db is offline
Afourian MVP
 
Join Date: May 2009
Posts: 4,474
Thanks: 49
Thanked 1,026 Times in 721 Posts
Barnacles vs. manifold pressure

A clean prop makes a big difference. If you get a vacuum gauge it will be obvious when it needs cleaning and mine really did!
Absent the vacuum gauge, it is not always as obvious why RPMs or speed is off.
Attached Images
 

Last edited by joe_db; 05-18-2020 at 08:14 AM.
Reply With Quote
The Following 5 Users Say Thank You to joe_db For This Useful Post:
Administrator (05-18-2020), Dave Neptune (05-18-2020), ronstory (05-18-2020), Surcouf (05-18-2020), thatch (05-18-2020)
  #2   IP: 67.169.215.221
Old 05-18-2020, 01:13 PM
ronstory's Avatar
ronstory ronstory is offline
Afourian MVP
 
Join Date: Feb 2016
Posts: 404
Thanks: 106
Thanked 208 Times in 152 Posts
Great data and thanks for sharing.

It seem seem your voltage is a bit low for a cruise RPM... is that planned or something else?
__________________
Thanks,
Ron
Portland, OR
Reply With Quote
  #3   IP: 137.103.82.227
Old 05-18-2020, 01:36 PM
joe_db's Avatar
joe_db joe_db is offline
Afourian MVP
 
Join Date: May 2009
Posts: 4,474
Thanks: 49
Thanked 1,026 Times in 721 Posts
That is at the end of the string from battery to the ignition switch then to the engine and then up to instruments. Depending on the stage the regulator is in, it is 13.8 to about 14.2 at the battery.
I have yet to check how accurate that voltmeter is, the reason it is there is so I can see if the combiner is on or not. I will get around to checking the voltage on my digital VOM and seeing if there are any drops at some point.
Reply With Quote
  #4   IP: 67.169.215.221
Old 05-18-2020, 02:51 PM
ronstory's Avatar
ronstory ronstory is offline
Afourian MVP
 
Join Date: Feb 2016
Posts: 404
Thanks: 106
Thanked 208 Times in 152 Posts
Cool. I get 14V at idle and 14.4 running and that seems to work well with my topped off batteries.
__________________
Thanks,
Ron
Portland, OR
Reply With Quote
  #5   IP: 69.250.111.245
Old 05-18-2020, 03:42 PM
sastanley's Avatar
sastanley sastanley is offline
Afourian MVP
 
Join Date: Sep 2008
Location: Solomons, MD
Posts: 7,016
Thanks: 1,134
Thanked 600 Times in 442 Posts
Quote:
Originally Posted by joe_db View Post
That is at the end of the string from battery to the ignition switch then to the engine and then up to instruments. Depending on the stage the regulator is in, it is 13.8 to about 14.2 at the battery.
I have yet to check how accurate that voltmeter is, the reason it is there is so I can see if the combiner is on or not. I will get around to checking the voltage on my digital VOM and seeing if there are any drops at some point.
I find the same thing, although I have no fancy combiner or anything. The voltage at the end of the ignition circuit is always a bit lower than the voltage I am reading from the battery selector switch, which is another gauge at the nav station. I just use the voltmeter in the cockpit to tell if the alt is working.
__________________
-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
http://www.moyermarine.com/forums/signaturepics/sigpic3231_6.gif
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Procedure for acid flushing and pressure flushing Don Moyer General Maintenance 55 06-14-2022 07:55 PM
Information about information and oil pressure issues Don Moyer Announcements 0 04-14-2009 08:30 AM
Oil Pressure / Rear oil seal - Next step Mark Harrington Drive Train / Propellers 6 11-24-2008 08:51 AM
Carburetor Internal Pressure Regulation Don Moyer Fuel System 2 04-12-2005 09:30 AM


All times are GMT -4. The time now is 04:28 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved