Reply
 
Thread Tools Display Modes
 
Old 03-03-2016, 11:48 AM   #1
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Meridian
Vessel Model: Albin 36 Trawler
Join Date: Aug 2014
Posts: 142
tach

I have a 1983 120 hp ford lelham diesel engine.. the tach starts to bounch back and forth when I go over 1500 rpms any thoughts as to why and what should I check? thank you
Kevin g
new Bern NC
__________________
Advertisement

KEVMAR is offline   Reply With Quote
Old 03-03-2016, 12:12 PM   #2
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 9,996
Greetings,
Mr. K. STAY OFF BUMPY ROADS! First, easiest and cheapest, check all your electrical connections including grounds (I'm assuming electric tach'). IF a cable tach', replace cable.
__________________

__________________
RTF
RT Firefly is offline   Reply With Quote
Old 03-03-2016, 01:56 PM   #3
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 5,745
Quote:
Originally Posted by KEVMAR View Post
I have a 1983 120 hp ford lelham diesel engine.. the tach starts to bounch back and forth when I go over 1500 rpms any thoughts as to why and what should I check? thank you
Kevin g
new Bern NC
Check the drive belt for the alternator. It could be slipping. I'd also check the alternator itself. A lot of the Lehman tachs are alternator driven. The diagram is from VDO.


Larry M is offline   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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 09:36 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012