Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-27-2015, 08:37 PM   #11
Lt. JG
 
Join Date: Nov 2011
Posts: 33
Default

Thanks I am in RI. I can look around for one.
__________________

wgalmond is offline   Reply With Quote
Old 05-27-2015, 08:38 PM   #12
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
Default

Quote:
Originally Posted by mmwjr View Post
Elbows are bolted on top of the manifolds and inject the raw water into the exhaust stream to cool the exhaust, most people call the risers however a riser is a 3 - 4 inch extension that goes between the manifold and elbow on big boats so that the elbow is above the water line.


On the mercruiser parts lookups, what you are calling an elbow is called a riser, and what you are calling riser is called a spacer. There doesn't seem to be one correct nomenclature for them.
__________________

Kevlar7r is offline   Reply With Quote
Old 05-27-2015, 08:39 PM   #13
Lt. JG
 
Join Date: Nov 2011
Posts: 33
Default

Hey Kevlar,
I replaced the OP last summer. As for the gauge sender, I believe they are separate like you mention. I disconnected the temp gauge hardness and the temp went right to nothing (with the boat running but idle anchored) When I plugged it in it goes back to where the temp was (160-175) So that is why I am thinking the temp sender itself?
wgalmond is offline   Reply With Quote
Old 05-27-2015, 08:47 PM   #14
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,432
Default

Quote:
Originally Posted by Kevlar7r View Post
On the mercruiser parts lookups, what you are calling an elbow is called a riser, and what you are calling riser is called a spacer. There doesn't seem to be one correct nomenclature for them.
Agree
__________________
Mike
mmwjr is offline   Reply With Quote
Old 05-27-2015, 08:48 PM   #15
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
Default

Quote:
Originally Posted by wgalmond View Post
Hey Kevlar,
I replaced the OP last summer.


Sorry, missed that on my skim through the thread.
Kevlar7r is offline   Reply With Quote
Old 05-27-2015, 08:49 PM   #16
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,432
Default

Quote:
Originally Posted by wgalmond View Post
Hey Kevlar,
I replaced the OP last summer. As for the gauge sender, I believe they are separate like you mention. I disconnected the temp gauge hardness and the temp went right to nothing (with the boat running but idle anchored) When I plugged it in it goes back to where the temp was (160-175) So that is why I am thinking the temp sender itself?

Temp sendor for the gauge and temp switch for the alarm, both are mounted in the t-stat housing.

Gauge sendor changes resistance to vary voltage on helm gauge to reflect temp.

Alam switch is normally open and closes if the engine gets too hot, this completes circuit to ground to sound alarm.
__________________
Mike
mmwjr is offline   Reply With Quote
Old 05-28-2015, 02:50 PM   #17
Lt. JG
 
Join Date: Apr 2015
Location: Seattle, WA
Posts: 36
Default

I had the same issue with my Alphas a few years ago. New impellers as well. Not sure if I got a bad batch or did something wrong during the install but I switched them out again and the problem was gone.

I got my IR gun at Home Depot. Take several readings, both manifolds, risers, block.

3 reasons you get a warning alarm while running, low oil pressure, running hot, or low gear lube.
__________________
Phil, Vicky, Ashleigh & Sydney
1998 3055

Life is short, boats are cool.
itsabowtime2 is offline   Reply With Quote
Old 06-01-2015, 07:16 PM   #18
Ensign
 
Join Date: Nov 2014
Posts: 13
Default

Any luck with the alarm? I got the same issue
Pilotrob25 is offline   Reply With Quote
Old 06-01-2015, 08:53 PM   #19
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,432
Default

Quote:
Originally Posted by Pilotrob25 View Post
Any luck with the alarm? I got the same issue

start a new thread describing what is occurring.
__________________
Mike
mmwjr is offline   Reply With Quote
Old 06-15-2015, 07:38 PM   #20
Lt. JG
 
Join Date: Nov 2011
Posts: 33
Default

This Sunday I took the boat out for a ride. Alarm still sounding. After changing the OP switch last summer and eliminating the gear lube reservoir, I disconnected the alarm plug for the audible. Sure enough, on my way back to port, NO ALARM. So my guess is it's a faulty temperature sender. Picked up a new one today ($31.00) and will be changing in next day or so. I will post the results!
__________________

wgalmond is offline   Reply With Quote
Reply

Tags
audible alarm, temp sensor

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


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 08:39 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.