Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-30-2019, 08:12 PM   #61
Guru
 
Vashon_Trawler's Avatar
 
City: St. Petersburg, Florida
Vessel Name: M/V Sherpa
Vessel Model: 24' Vashon Diesel Cruiser
Join Date: Jun 2013
Posts: 591
Hi. I am not sure how black smoke got into the discussion, but fortunately I am not blowing black smoke either underway or in gear at the slip. I was originally blowing a cloud of white smoke that reeked like diesel and subsided immensely after having the injectors serviced. I presently have a small amount of white smoke and an elevated temp (195 degrees) when I approach 3000 RPM. I believe I have a restriction at the seacock, which I hope to resolve next week. I will report my results!
__________________
Advertisement

__________________
“Go small, go simple, go now”
― Larry Pardey, Cruising in Seraffyn
Vashon_Trawler is offline   Reply With Quote
Old 05-20-2019, 01:42 PM   #62
Guru
 
Vashon_Trawler's Avatar
 
City: St. Petersburg, Florida
Vessel Name: M/V Sherpa
Vessel Model: 24' Vashon Diesel Cruiser
Join Date: Jun 2013
Posts: 591
Hello, all. This will likely be the last post as I finally resolved the white smoke issue. To recap, I was blowing stinky, diesel smelling white smoke. My engine has 600 hours, and there were no indications that I was losing coolant (i.e., not a head gasket issue). The smoke became progressively worse as the RPM increased.

1) I had my injectors serviced--one nozzle was particularly filthy. The result was a significant reduction in white smoke at start-up and no sheen in the water as well. I also saw a HUGE reduction in the white smoke while underway.

2) I still had a very small amount of white smoke at higher RPMs, and my temp seemed much higher than normal but no overheating. Well, it was a little steam. I did remove my cabin heater before the injector servicing, which resulted in a higher operating temp. The engine's raw water pick up has a 5/8" barb. The hose then went to a 3/4" hose via an adapter. I suspected there was not enough water flow as the engine was designed for 3/4". I replaced the barb with a full-flow 1/2 NPT to 3/4" barb and ran a new length of 3/4" hose to the strainer. The engine ran slightly cooler, and I no longer observed the small amount of steam.

It, therefore, appears that I had two issues. I will be hauling the boat out in the winter to replace the current raw water strainer/through hull and valve arrangement. It appears that the current valve is too small (1/2" NPT to 3/4" barb). I will replace the through hull with a larger 3/4" scoop and a 3/4" flanged valve. I've owned the boat for several years, but perhaps the cabin heater was masking the water flow issue and allowing the engine to run cooler with the reduced flow.
__________________

__________________
“Go small, go simple, go now”
― Larry Pardey, Cruising in Seraffyn
Vashon_Trawler is offline   Reply With Quote
Old 05-20-2019, 02:53 PM   #63
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Join Date: Jan 2013
Posts: 6,536
Great job sorting this out!
__________________

__________________
MVTanglewood.com
twistedtree 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 04:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×