Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 01-02-2017, 03:01   #1
Registered User

Join Date: Jan 2011
Location: sydney
Boat: hunter 310 / sunrunner 3300 / maxum scr 2400
Posts: 51
Question Mercruiser 8M6000623 water pressure sensor chinese made

Has anyone had any luck with the spate of chinese made water pressure sensors that are claimed to be the same as Mercruiser 8M6000623.

out of the three I now have, when connected to my Smartcraft engine gateway, they all either read 0 psi or 40.8 psi. That said, the 2 beeps alarm when water pressure is low is silenced.

Searching the web there appears to be a test using a omhs meter, but that seems to be conflicting with the readings I get, as per the table below.

PINS WEB DATA WORKING SENSOR A SENSORS B and C
ONE
A - B 31.5 Kohms 120K 23K 108K

B - C 42.9 Kohms 142K 36K 136K

Sensor A (different seller) seems to match the web data I found but is nowhere near the ohms readings of one Working One I have and the other two sensors B and C

Sensors B and C (same seller) seems to match the one good Working One I have left (black head not white which are known to fail), so in theory they should work to show linear changes in resistance (and hence changes in water pressure).

That said, the chinese made one only seem to have a "A" stamped on it and no numbers and some of the ads I have seen say things like "oil pressure" and stainless steel"

see For Mercury Marine Mercruiser MotoTron Water Pressure Sensor 8M6000623,8818793 | eBay
Attached Files
File Type: pdf SEA water pressure sender test .pdf (182.0 KB, 512 views)
mghunter is offline   Reply With Quote
Old 07-04-2017, 05:28   #2
Registered User

Join Date: Jan 2011
Location: sydney
Boat: hunter 310 / sunrunner 3300 / maxum scr 2400
Posts: 51
Re: Mercruiser 8M6000623 water pressure sensor chinese made

I'm surprise no one else has tried these, unless they read this first.

That said,I have yet to get one that works as the original Mercruiser one.

Given they read 40.4 psi, I suspect they are 0 -100 psi (oil or fuel sensors) and not 0-50 psi (water)

Some more data FYI

The 881879-11 pressure sensor is used on many Mercury Marine and Mercruiser engine models. MotoTron also used this sensor across many customer applications. This sensor is a -4.7-100 PSI, with a burst proof pressure rating of 150 PSI and a rated burst pressure of 500 PSI. Vout = 0.04 (PSI in Absolute) - 0.088. I added the pin out of this sensor in pictures area so that you can diagnose your sensor prior to replacing it.

The 881879-10 pressure sensor is used on many Mercury Marine and Mercruiser engine models. MotoTron also used this sensor across many customer applications. This sensor is a 0-50 PSI, with a burst proof pressure rating of 100 PSI and a rated burst pressure of 325 PSI. Vout = 0.08 (PSI in Absolute) + 0.5. This sensor supersedes 881879-3. Sensor 881879-10 will also work as a replacement to 8M6000623.

These sensors are very robust. I have seen on applications where these sensors are mounted on closed cooling heat exchanger on Mercruiser engines where excessive static charge built up on the tank due to the flow of water and routing of spark plug wires, energy would dissipate through sensor and cause the sensor to fail. Make sure your heat exchanger is grounded!

There are 3 pins on the connector A (BLK/BRN). B (GRY) and C (BK BLU/YEL)
Readings should red as follows at 70 degrees
A to B 31.5 ohms
A to C 42.9 ohms


Grey is the 5V power feed, Blk/Pk is the 5v ground lead and the Dk blue/yel is the reference lead to the computer.
Attached Thumbnails
Click image for larger version

Name:	water pressure sensor pinouts.png
Views:	645
Size:	70.4 KB
ID:	144865  
mghunter is offline   Reply With Quote
Old 26-06-2019, 21:41   #3
Registered User

Join Date: Jun 2019
Posts: 1
Re: Mercruiser MerCruiser CAN Converter 94032 + 94 water pressure sensor chinese made

I was just bitten by this, my sensor reads 0 psi. Paid about $30 on ebay 4 months ago. Obviously NOT a compatible part. It must have worked for a few months but dead now.
toy4two is offline   Reply With Quote
Old 27-06-2019, 02:16   #4
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,129
Images: 241
Re: Mercruiser 8M6000623 water pressure sensor chinese made

Greetings and welcome aboard the CF, toy4two.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Reply

Tags
cruiser, cruise, water

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda 2.3 Now Chinese Made flash Auxiliary Equipment & Dinghy 21 24-01-2023 03:16
Send Over-Pressure Shore Water Over the Side with Pressure Valve ? sdowney717 Plumbing Systems and Fixtures 7 28-06-2018 17:45
Tank Level from Hydrostatic Pressure Sensor? myocean Plumbing Systems and Fixtures 2 03-01-2013 07:29
Chinese-Made Aquapro RIBs gchliu Auxiliary Equipment & Dinghy 0 14-02-2011 21:30

Advertise Here


All times are GMT -7. The time now is 02:46.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.