Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-06-2020, 01:49 PM   #1
Member
 
City: Punta Gorda Fl
Vessel Name: LeSeas
Vessel Model: 30 Mainship II
Join Date: Apr 2020
Posts: 23
new boat

Hello all. Just purchased a 2005 Mainship 30 pilot 2 The Tach works fine for about an hour and then gets erratic and stops. The boat has a 315 Yanmar. Where is the sending unit located ? Also, has anyone installed a fresh water flush on the raw water intake for this style boat? Thanks in advance for any and all information.
Leseas is offline   Reply With Quote
Old 04-06-2020, 01:57 PM   #2
TF Site Team
 
FlyWright's Avatar
 
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
My tachs get their signal from the alternators. Sometimes, when the alternator output drops as battery charges, the tech signal will be lost. Try increasing the load by turning on a high draw item like a heater on an inverter or a high demand 12v item. As the alternator output rises to meet the new demand, you may see the tach signal return.
__________________
My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al FJB

@DeltaBridges - 25 Delta Bridges in 25 Days
FlyWright is offline   Reply With Quote
Old 04-06-2020, 02:41 PM   #3
Guru
 
porman's Avatar
 
City: Duvall, Wa. USA
Vessel Name: Beach Music II
Vessel Model: 2003 Mainship 430 Trawler
Join Date: Aug 2014
Posts: 1,040
Our Yanmars (370hp 6LYA-STP) have a sending unit on the flywheel housing. I bumped it once while opening the seacock and lost the tach signal on one engine.
porman is offline   Reply With Quote
Old 04-06-2020, 03:00 PM   #4
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,187
Welcome aboard. Nice boat, have fun.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 04-06-2020, 03:09 PM   #5
Member
 
City: Punta Gorda Fl
Vessel Name: LeSeas
Vessel Model: 30 Mainship II
Join Date: Apr 2020
Posts: 23
Thanks was the unit on the port or starboard side of the engines.
Leseas is offline   Reply With Quote
Old 04-06-2020, 04:20 PM   #6
Guru
 
porman's Avatar
 
City: Duvall, Wa. USA
Vessel Name: Beach Music II
Vessel Model: 2003 Mainship 430 Trawler
Join Date: Aug 2014
Posts: 1,040
Quote:
Originally Posted by Leseas View Post
Thanks was the unit on the port or starboard side of the engines.
Starboard side. Two wires going to it. My wiring diagram shows orange and black wires. Yours may be different.
porman is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 07:06 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012