Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Drawings and Schematics

Reply
 
Thread Tools Display Modes
  #1   IP: 75.47.134.223
Old 02-09-2012, 08:58 PM
osvaldo osvaldo is offline
Member
 
Join Date: Feb 2012
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Atomic 4 Direct Transmission

My Atomic 4 direct transmission makes excesive noice when in forward. Reverse is fine. I would like to see a detailed drawing of the transmission to determine what could be wrong. Anyone knows where I can get such drawing ? Or ideas what could be the source of the high noice.

Thanks for your responses. I'll keep looking for an unswer to my problem.
Yesterday I push the transmission lever further forward and while I hold it in that position, the ratle noice stops. Any new ideas?
Reply With Quote
  #2   IP: 216.115.121.240
Old 02-10-2012, 01:29 AM
lat 64's Avatar
lat 64 lat 64 is offline
Afourian MVP
 
Join Date: Oct 2008
Location: Fairbanks, Alaska
Posts: 1,964
Thanks: 39
Thanked 240 Times in 157 Posts
Don't miss Pdf attached also, it's a nice drawing, but I can't remember where I got it. Here maybe?
My apologies to Bill (webmaster) if these are redundant to other resources on this site.

The Mmi video on this subject is worth it too.

http://www.moyermarine.com/cgi-bin/s...rebuilder.html

russ
Attached Images
File Type: jpg reversing-gear.jpg (120.3 KB, 271 views)
Attached Files
File Type: pdf reverse_Gear.pdf (86.7 KB, 105 views)
__________________
Whiskeyjack a '68 Columbia 36 rebuilt A-4 with 2:1

"Since when is napping doing nothing?"
Reply With Quote
The Following User Says Thank You to lat 64 For This Useful Post:
Surcouf (11-05-2019)
  #3   IP: 128.183.140.38
Old 02-10-2012, 10:06 AM
edwardc's Avatar
edwardc edwardc is offline
Afourian MVP
 
Join Date: Aug 2009
Location: Laurel, MD
Posts: 2,509
Thanks: 153
Thanked 595 Times in 388 Posts
Quote:
Originally Posted by osvaldo View Post
My Atomic 4 direct transmission makes excesive noice when in forward. Reverse is fine. I would like to see a detailed drawing of the transmission to determine what could be wrong. Anyone knows where I can get such drawing ? Or ideas what could be the source of the high noice.
Sounds very strange, as the transmission is essentially a straight through connection in forward, with the whole assembly clamped together and rotating in unison.

Its in reverse that there are gears rotating and it always makes a lot more noise that way.
__________________
@(^.^)@ Ed
1977 Pearson P-323 "Dolce Vita"
with rebuilt Atomic-4

Reply With Quote
  #4   IP: 148.170.241.1
Old 02-10-2012, 10:07 AM
ILikeRust's Avatar
ILikeRust ILikeRust is offline
Afourian MVP
 
Join Date: Sep 2010
Location: Henrico, VA
Posts: 2,202
Thanks: 2
Thanked 23 Times in 21 Posts
Quote:
Originally Posted by osvaldo View Post
My Atomic 4 direct transmission makes excesive noice when in forward. Reverse is fine. I would like to see a detailed drawing of the transmission to determine what could be wrong. Anyone knows where I can get such drawing ? Or ideas what could be the source of the high noice.
Just a quick clarification that I hope is helpful - it's not really so much of a "transmission" as it is a clutch. Being that it is a "direct" drive, there is no set of gears to "transmit" the power from the engine (at least in forward). Instead, when you shift the lever to engage forward, all you're doing is engaging a clutch, which makes the prop shaft rotate as one with the crankshaft of the engine.

The clutch assembly houses a set of planetary gears, which enable reverse. I've always been impressed with the genius of the design - it is elegant in its relative simplicity.

Are you absolutely sure the noise is coming from the drive assembly? Make sure you're isolating where the noise actually is coming from.

What kind of noise is it? A rattle? A thump? A whine? A screech? A moan? A groan?

I make a lot of those just getting up in the morning...
__________________
- Bill T.
- Richmond, VA

Relentless pursuer of lost causes
Reply With Quote
  #5   IP: 71.253.247.51
Old 02-10-2012, 10:54 AM
Ball Racing's Avatar
Ball Racing Ball Racing is offline
Afourian MVP
 
Join Date: Jul 2011
Location: VA
Posts: 506
Thanks: 2
Thanked 13 Times in 10 Posts
This will sound crazy, but you are running a right hand prop, right?
__________________
Tyring to keep the Bay's Wooden Boat's history from dying off completely.
Daniel
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
Catalina Atomic 4 No Crank Problem Resolved Don Moyer Catalina 27 01-10-2013 11:20 AM
Direct Drive Output is STUCK!! mike7a10 Reversing Gear 4 11-15-2009 10:45 AM
Late model, direct drive Atomic 4 whagstrom For Sale - Engines and Engine Parts 0 11-30-2007 04:02 PM
Atomic 4 transmission behavior sailingdude Drive Train / Propellers 3 11-10-2007 10:35 PM
Noise coming from the transmission Unregistered Reversing Gear 1 03-28-2005 08:57 AM


All times are GMT -4. The time now is 08:52 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