Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-20-2011, 09:18 PM   #1
Commander
 
Join Date: Mar 2010
Location: Southern Maine
Posts: 289
Default Why is one riser hot and one cold?

So today I was winterizing my 2000 1900SR 4.3l Alpha 1 Gen 2 raw water cooling. While running it up to temperature to change the oil with the engine cover off to I happened to touch the PORT riser and then the STBD riser and noticed a significant difference in temperature between the two. The PORT riser was cool to the touch and the STBD was hot. While I had the thermostat housing apart it appears that the raw water is directed through the PORT riser first then circulates through the STBD after passing through the engine. Anybody know if I am guessing right on this or should I worry about a cooling blockage? The risers were replaced the year before I got the boat so I believe they are in good shape as I have put less that 50 hours on it since buying the boat and little of that was in salt water.

-JP
__________________

CountryME is offline   Reply With Quote
Old 11-21-2011, 01:02 AM   #2
Admiral

 
seapuppy's Avatar
 
Join Date: Nov 2005
Location: Everett Wa
Posts: 4,681
Default

you are correct...the water flow is thru the port side and makes it's way to the stbd side removing heat as it goes......


I would concider running some salt away thru the system to clear out any possible salt build up...



SP
__________________

__________________
Don't compare your life to others. You have no idea what their journey is all about.
------------------------
SSN683 Association member
Par Excellence
------------------------------
2008 Bayliner 340 - "Wild Whim"
--------------------------------------
I live in my own little world....but it's okay-they know me here!!!

Avid practitioner of the martial art: KLIK-PAO.
Tap-Rack-Bang

Anyone that sez "Size doesn't matter" has never owned a boat!
seapuppy is offline   Reply With Quote
Old 11-21-2011, 01:23 AM   #3
Commander
 
Join Date: Mar 2010
Location: Southern Maine
Posts: 289
Default

Thanks for the validation SP.
CountryME is offline   Reply With Quote
Old 11-21-2011, 10:25 AM   #4
Lieutenant
 
Join Date: Aug 2011
Location: Bourne, Ma.
Posts: 83
Default

Seapuppy,
What is saltaway and how is it used? I have power-boated in salt water the last 25 years and never heard of this.
thanks,
ccruser1
ccruser1 is offline   Reply With Quote
Old 11-21-2011, 12:21 PM   #5
Moderator

 
shrew's Avatar
 
Join Date: Apr 2008
Posts: 5,588
Default

Here is a link to Saltaway:

http://www.saltawayproducts.com/

Good Stuff!
shrew is offline   Reply With Quote
Old 11-22-2011, 12:10 AM   #6
Commander
 
dronthelake's Avatar
 
Join Date: Sep 2010
Location: Chatlotte, NC (Lake Norman)
Posts: 253
Default

Not to throw a wrench in the conversation but I always thought the water went through the block first then to both exhausts manifolds at the same time. My manifolds have always been the same temp. My first guess is that the hot manifold is restricted with rust.

http://www.perfprotech.com/store/art...ling-tips.aspx

http://www.boatfix.com/how/cooling.html
__________________

__________________
David & Carol
Charlotte, NC (Lake Norman)
3700 SCR "Comfortably Numb"
dronthelake 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


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 01:46 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.