Mercury Tachometer Question - Stripers247.com Forums
 
Striped Bass Fishing Site Map | Contact Us | Fishing Log Software | Fishing Online | Advertise
to UPLOAD: please register or login

Go Back   Stripers247.com Forums > MAIN FORUM DISCUSSION > Boaters Forum > Boat repair issues & Shop Maintenance
Forgot Password? Register Now!!

Boat repair issues & Shop Maintenance Tips and discussion on Boat parts/boat maintenance.


Reply
 
Thread Tools
  #1  
Old 07-20-2007, 11:27 AM
final_fantasy final_fantasy is offline
 
Join Date: Jul 2007
Posts: 21
Default Mercury Tachometer Question

Hi All:

My '97 2-stroke Mercury Outboard 135hp (NOT an optimax) has a little issue with the tachometer. It seems to "flutter", like the needle sways all over the place for a minute or two, then will eventually give a normal reading.

For example, If I'm running at headway speed, the tach needle will hover between 2-3k rpm, which I clearly am not at.

Engine seems to run fine otherwise, no other problems (knock on wood)...

What are some things I should look at in troubleshooting this problem?

Thanks in advance.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 07-20-2007, 11:36 AM
Roccus's Avatar
Roccus Roccus is offline
King of Eels
Pro Staff
 
Join Date: Feb 2005
Location: Reading, Mass/Rings Island
Posts: 4,227
Default Re: Mercury Tachometer Question

Check for lose or corroded connections on both the tach and the rectifier( the gray wire is the sigmnal wire)... if all is well, replace the tach, it's driven off of voltage spikes from the stator, a bad rectifier can make the tach inoperable, but when the rectifier goes bad, it either works or it doesnt....
__________________
.
Reply With Quote
  #3  
Old 07-20-2007, 12:01 PM
final_fantasy final_fantasy is offline
 
Join Date: Jul 2007
Posts: 21
Default Re: Mercury Tachometer Question

Quote:
Originally Posted by Roccus View Post
Check for lose or corroded connections on both the tach and the rectifier( the gray wire is the sigmnal wire)... if all is well, replace the tach, it's driven off of voltage spikes from the stator, a bad rectifier can make the tach inoperable, but when the rectifier goes bad, it either works or it doesnt....
What are some other symptoms of a rectifier going bad, other than my tach issue?

I did have an isolated problem one day where the engine would NOT turn over after it stalled in an idle. I probably cranked it 15 times before it finally did turn....
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 07-20-2007, 12:24 PM
Roccus's Avatar
Roccus Roccus is offline
King of Eels
Pro Staff
 
Join Date: Feb 2005
Location: Reading, Mass/Rings Island
Posts: 4,227
Default Re: Mercury Tachometer Question

If the rectifier is bad, the engine wont charge the battery... if the battery doesnt charge ... you know the rest...
__________________
.
Reply With Quote
  #5  
Old 07-20-2007, 01:51 PM
final_fantasy final_fantasy is offline
 
Join Date: Jul 2007
Posts: 21
Default Re: Mercury Tachometer Question

Thanks Roccus. If you ever need help fixing your computer, let me know, I'm a technician in the IT field :)
Reply With Quote
Reply

Bookmarks

Tags
mercury, question, tachometer

Thread Tools

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
WTS : 2014 Yamaha Outboards 150HP $5300, Honda 150 HP wtwine Buy - Sell - Trade 2 01-26-2016 07:51 PM
Best Price On Evinrude E-Tec 175 Hp Outboard Motor $4000 wtwine Boaters Forum 0 01-20-2016 02:40 PM
Mercury declining in Hudson's fish CaptainMorgan! Striped Bass Fishery Conservation / Politics / Management / News 0 07-26-2008 11:14 PM
I Got A Question For You Older Members --about Briaded line hung4wheeler Hudson River 11 02-25-2008 01:45 PM
One Question Test : Striperjim The Lounge 10 12-07-2007 03:32 AM


All times are GMT -4. The time now is 02:19 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright 2004 - 2013 Stripers247.com LLC
Affiliated Sites:   Noreast.com   Allcoast.com    2coolfishing.com