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 17-01-2025, 20:37   #1
Registered User
 
Ensign Claptrap's Avatar

Join Date: Apr 2021
Location: Long Beach, CA USA
Boat: Fantasia 35
Posts: 4
Yanmar 3QM30 (FWC conv.) Temp Sender - which one?

Hello everyone,
I'm going cross eyed trying to figure this out. I have a Yanmar 3QM30 engine, converted to FWC with Sen-Dure Hx. There was also a factory FWC version, 3QM30Y -- I do not have this engine.

I need to replace the temp sender.

I've attached the pages from the parts catalog so everyone can play along. On there my engine is listed as "3QM30", and the FWC version is "3QM".

I think the engine is supposed to run 10 degrees hotter due to the FWC conversion (190 instead of 180, if memory serves).

So here's the question: Should be using the "3QM" temp sender from the FWC version? (Yanmar P/N: 144626-91590)

If so, great! It's available, I can order the OEM part, and then crack a cold one.

If not, the "3QM30" temp sender is graveyard of discontinued part numbers, and a vast rabbit hole of trying to figure out what part to replace with, color codes vs. temp ratings, etc. (hence the cross eyed part). All this will lead to the obvious follow up question: which one of these do I buy? (I *might* have already bought the wrong one once and found my temp gauge needle doesn't move until the engine is up to temp, then instantly goes pegged to full...)

Thanks in advance for the help!
Attached Thumbnails
Click image for larger version

Name:	Pages from Yanmar 3QM30 Parts Catalog_Page_1.jpg
Views:	30
Size:	416.3 KB
ID:	297839  
Ensign Claptrap is offline   Reply With Quote
Old 17-01-2025, 23:45   #2
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 21,525
Re: Yanmar 3QM30 (FWC conv.) Temp Sender - which one?

The real question should be - what temperature gauge do you have? Make / model / part number etc. This detail will enable you to determine what senders are compatible with the gauge.

The sender has to suit the gauge and there are several common standards and a few non standard gauges.

Is the existing gauge an original Yanmar unit for the 3QM30 or was it fitted when the FWC cooling was carried out. If so, who supplied the gauge and did they change the Yanmar 3QM30 sender.

Note - Yanmar do not manufacture temp senders (or gauges), they use units from OEM suppliers.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is online now   Reply With Quote
Old 18-01-2025, 00:33   #3
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: 51,858
Images: 241
Re: Yanmar 3QM30 (FWC conv.) Temp Sender - which one?

Quote:
Originally Posted by Wotname View Post
The real question should be - what temperature gauge do you have? Make / model / part number etc. This detail will enable you to determine what senders are compatible with the gauge.

The sender has to suit the gauge and there are several common standards and a few non standard gauges.

Is the existing gauge an original Yanmar unit for the 3QM30 or was it fitted when the FWC cooling was carried out. If so, who supplied the gauge and did they change the Yanmar 3QM30 sender.

Note - Yanmar do not manufacture temp senders (or gauges), they use units from OEM suppliers.
Basic Engine Gauge Theory and Testing
https://www.cruisersforum.com/forums...sting-645.html

Senders ➥ https://www.cruisersforum.com/galler...r&imageuser=79

__________________
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 offline   Reply With Quote
Old 20-01-2025, 08:50   #4
Registered User
 
Ensign Claptrap's Avatar

Join Date: Apr 2021
Location: Long Beach, CA USA
Boat: Fantasia 35
Posts: 4
Re: Yanmar 3QM30 (FWC conv.) Temp Sender - which one?

Oh jeez, a whole 'nother rabbit hole!

Thank you both for the info!

Had no idea there were different impedances for different gauges. Didn't note that in my research. Think I was looking from the sender "side" of things, which all seem to be concerned with temp ranges and color codes.

Got to the boat and took apart the cluster to check out the gauge. It's a Teleflex model, but unsure which one. The few numbers on it don't seem to jive with any products (maybe the 53215 number?).

Seems there is a Teleflex/Seastar sender available on Defender.com, and it looks like the 3/8" NPT fitting should match my engine, so for $25 I'll give it a shot.

If that doesn't work, I'll break out the ohm meter and do some testing following the directions given and probably asking more questions because electrical stuff is REALLY not my bag (but trying to learn!).

Thanks again, guys!
Attached Thumbnails
Click image for larger version

Name:	20250118_190205.jpg
Views:	7
Size:	410.0 KB
ID:	297918   Click image for larger version

Name:	20250118_191040.jpg
Views:	9
Size:	406.5 KB
ID:	297919  

Ensign Claptrap is offline   Reply With Quote
Old 21-01-2025, 05:42   #5
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: 51,858
Images: 241
Re: Yanmar 3QM30 (FWC conv.) Temp Sender - which one?

Teleflex water temperature senders have an ID code*, stamped on the wrench hex of sender.

*ID Code - Part # - NPT Thread - Temp Range °F
003 - 52320S003 - 1/2" - 120-240°F
004 - 52320S004 - 1/4 - 120-240°
009 - 52320S009 - 3/8 - 120-240
010 - 52320S010 - 1/8 - 120-240
016 - 52320S016 - 1/4 - 120-240 [2 Gauges]
017 - 52320S017 - 1/2 - 120-240 [2]
018 - 52320S018 - 3/8 - 120-240 - [2]
60 - 52320S010 - 1/8 - 120-240
61 - 52320S004 - 1/4 120-240
62 - 52320S009 - 3/8 - 120-240
63 - 52320S003 - 1/2 - 120-240
230 - IA96035* - 1/8 - 50-200
15000 - 52320S004 - 1/4 120-240
15002 - 52320S016 - 1/4 - 120-240 [2 Gauges]
15009 - 52320S017 - 1/2 - 120-240 [2]
15010 - 52320S003 - 1/2 120-240
15013 - 52320S009 - 3/8 120-240
15014 - 52320S018 - 3/8 120-240 [2]
96061 - 52320S010 - 1/8 120-240

* Use only with old style 50-200°F gauges. [Do not use with C-H or 120-240°F gauges.]
__________________
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 offline   Reply With Quote
Reply

Tags
yanmar

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
For Sale: Yanmar 3QM30 Engine + Parting out 2nd 3QM30 kevincook General Classifieds (no boats) 1 27-11-2022 11:00
Temp Alarm Sender for Volvo Penta islandrunner70 Engines and Propulsion Systems 5 12-12-2021 21:37
Temp sensor and sender needed for Yanmar dougtheslug Engines and Propulsion Systems 8 13-03-2019 23:11
Westerbeke 46 Temp Sender vs. Temp Switch zboss Engines and Propulsion Systems 8 29-10-2013 22:11
Temp Gauge/Sender ??? drh1965 Engines and Propulsion Systems 9 13-01-2008 21:22

Advertise Here


All times are GMT -7. The time now is 16:17.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2025, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.