Transmission Slippage - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Gas > Atomic 4
 Not a Member? 
  #1  
Old 08-23-2006
Junior Member
 
Join Date: Aug 2006
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
brianm132 is on a distinguished road
Transmission Slippage

Hello All,

at the beginning of the season i replaced my ignition system, (coil, cap, plugs, etc.) to address problems with no/little power in forward and fine in reverse. i also replaced the carburetor and added a secondary fuel filter. i adusted the timing and was able to get up to about 4.5 - 5 knots max. whenever i would push the rpms to go faster the transmission would slip and rev very high. i would have to throttle down and then up in order for it to catch again. in mid july i let the boat sit for about 2 to 2.5 weeks and when i returned the max i was able to get was maybe 2.5 to 3 knots in forward. again reverse was/is fine. i took the boat out and reset the timing again but she still will give me very little power in forward and slips. a friend told me i may have stripped something in the transmission since i have had the boat for 3 years and have always sailed with the engine in neutral. i don't think there is anything on the prop. just before the season started i did a short haul had the bottom washed and new zincs installed.

Can anyone help with this issue.

Thanks.

BTW - i sent this question to Don Moyer earlier today.
Reply With Quote Share with Facebook
  #2  
Old 08-23-2006
NickL's Avatar
Senior Member
 
Join Date: May 2006
Posts: 121
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
NickL is on a distinguished road
The pitch could be too great on the prop.
Reply With Quote Share with Facebook
  #3  
Old 08-23-2006
Senior Member
 
Join Date: May 2006
Posts: 247
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
mike dryver is on a distinguished road
brian sounds like you have a fluid problem in the tranny. what you did at start of season was irrelevent. if you have no problem in reverse then there should not be an ignition problem in forward. the ig. works the same in both directions. any way have you checked the level of your fluid or to see if there is h2o in the fluid. what kind of tranny is it. ect. if the fluid is ok then you could have warped clutch plates, or if the plates had fibre contact surfaces which borg-warner changed to for awhile in the early 80s the contact surfaces could have fallen off if any moisture got into the tranny. these plates were replacement for the sintered bronze plates i believe because they engaged softer and because they were cheaper to make. the problem with was that water would cause them fail and fall off the clutch disc. if this the case with your tranny you have either lost the friction surface or there is debris in the fluid passages for forward causing a restriction of fluid flow which will also cause slippage
regards mike
Reply With Quote Share with Facebook
  #4  
Old 08-23-2006
Junior Member
 
Join Date: Aug 2006
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
brianm132 is on a distinguished road
Transmission Slippage (Atomic 4)

I guess I should have added that this is an atomic 4 engine
Reply With Quote Share with Facebook
  #5  
Old 08-23-2006
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
cardiacpaul is a jewel in the rough cardiacpaul is a jewel in the rough cardiacpaul is a jewel in the rough
a4 tranny

The transmission lube is common to the engine oil, no separate supply.

sounds like forward needs adjustment. heres the instructions.

http://www.geocities.com/atomfour/A4Tips.html#IND%20S
__________________
We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
Reply With Quote Share with Facebook
  #6  
Old 09-05-2006
Member
 
Join Date: Aug 2001
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
owlmtn is on a distinguished road
On the Atomic 4 the transmission can be adjusted easily. It's a bit complicated to explain here but if you own one of these engines you need (really really need) the Atomic 4 manual from Moyer Marine. you can order it on their website. Their manual has the only clear explanation of how to do it. when you adjust it, take it a little at a time. If you need any further help i'd be glad to offer what I can. Jim L
Reply With Quote Share with Facebook
  #7  
Old 09-05-2006
Junior Member
 
Join Date: May 2004
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
tenders is on a distinguished road
I completely agree with Cardiacpaul. Textbook case of loose clutch adjustment -- and when you hear hooves, think horses before zebras.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

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



All times are GMT -4. The time now is 09:39 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.