Diesel acting up, ideas? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 03-13-2006
Someday...
 
Join Date: Mar 2004
Location: NC, USA
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
ilnadi is on a distinguished road
Diesel acting up, ideas?

First, I am taking the boat to the local yard I trust since I have not touced the diesel on my own yet (18-month owner). Second it's a bit long winded I wanted to get it all in.

Engine is Universal M12 with Hurst transmission. Boat is ina river off the Neuse river/Pamlico. I assume we have fresh to brakish water. A month ago I ran the engine for ~30 min to clean it out and charge the batteries, al in the slip. No problem.

Last weekend was clean-up day and I was spraying mildew killer everywhere. I took one of he side panels off the engine compartment and sprayed the fiberglass underneath. I did not spray the engine directly but I'm sure it got enough incidental. Did not start the engine that day.

Next day, we take the boat out (left engine cover off). Engine coughs a bit but starts and runs fine. On the way out the channel the buddy helping me out is steering and I am putting things away, etc. Notice HOT smell, stick my head down companionway, smoke everywhere. I look at the gauges, temp off the scale. I put the engine in neutral (can't remember if I throttled down) and engine dies. I am unhappy. Furtunately wind is blowing into marina, so we float back top the end of the dock and tie up.

I notice the engine control panel (which is on the sidewall of the cockpit footwell, over the engine) is all steamed up. No smell of burning rubber or oil and I can actually touch the oil filter. After 15-20 min we turn on the ignition and temp down to bottom on gauge. So now I am thinking the water from yesterday steamed (steam, not white smoke) and faked out the temp gauge. We start the engine, watching the temp gauge and looking for smoke. Nothing. I crawl into the q-berth and I see a few white wisps, but now I am thinging it's steam.

We go out the channel, all OK. finally throttle down to put up the sail, look down: Temp off the scale; look below, smoke everywhere and now it's burning my throat (still coudl not identify it as burning oil or rubber).

By now we are outside and sails are up. So we sail around a bit to calm down. On the way back I sailed almost to the slip (involves a u-turn and backing in) started the enging to push boat back and turned it off pretty quickly, so never got a chance to heat up.

any thoughts?
Reply With Quote Share with Facebook
  #2  
Old 03-13-2006
paulk's Avatar
Senior Member
 
Join Date: Jun 2000
Location: CT/ Long Island Sound
Posts: 2,533
Thanks: 4
Thanked 20 Times in 19 Posts
Rep Power: 15
paulk is on a distinguished road
Basics

First thing that comes to mind (as always) is a faulty impeller or pump. It might work ok for a while, then stop. Also likely are a stuck thermostat or plugged intake. You don't mention seeing water coming out of the exhaust at any time, or the amount of it. That's what I always check for first when I run any engine. In colder weather, it can take a good bit of time for a diesel to work up to overheating, which could explain your second episode. Besides a stray piece of plastic clogging it, a lot of vegetation can grow in an intake gently caressed by nutrient-rich brackish water several times a day over a month's time.

Last edited by paulk; 03-13-2006 at 09:43 AM. Reason: typo
Reply With Quote Share with Facebook
  #3  
Old 03-13-2006
sailortjk1's Avatar
Senior Member
 
Join Date: Dec 2005
Location: Porter, IN
Posts: 4,647
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 10
sailortjk1 has a spectacular aura about sailortjk1 has a spectacular aura about
First thing that comes to mind is the impeller (Paul beat me to it). Check for healthy water discharge through the exhaust.
Reply With Quote Share with Facebook
  #4  
Old 03-13-2006
Someday...
 
Join Date: Mar 2004
Location: NC, USA
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
ilnadi is on a distinguished road
I knew I'd forget stuff even being long-winded.

- Seacock was open and water was coming out of the exhaust back in the slip. Somewhere arond normal amount, did not notice it being low. There was water coming out wven when smoking.

- Oil was 3/4 from "low" to "high" and black (I did not see any foam or white) in between the two eposides.

I did look around wth a flashlight when the engine was running but not when it was "smoking". Kinda chickened out of sticking my head into a smoking engine.
Reply With Quote Share with Facebook
  #5  
Old 03-13-2006
Member
 
Join Date: Feb 2006
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
DynaMeme is on a distinguished road
Something to check. On older engines (happened to my Volvo at 13 years) the water injection port to the exhaust elbow carbons up and gets restricted. Ultimately this results in a burn through on the lower side of the elbow and it's not always visible.

Here's what happens. The engine starts fine and because the exhaust elbow is cool and the block is cool everything seems normal. As both heat up, you start to see steam (white wisps) and may smell a bit of exhaust. The restricted water flow is preventing a lot of splash and the engine isn't overheated so not much smoke.

As the engine overheats and combustion goes to heck, the smoke starts pouring from the hole in the elbow and the limited flow of water all flashes to steam so there is no evidence of a leak.

Grab an inspection mirror and a flash light and see if such a hole is there. It may not be very large. Don't hunt for it buy hand without looking. Mine had sharp enough edges to shred fingers.

You may notice a reduced water flow at the overboard discharge but it depends on the size of the hole and how badly restircted the flow is.

Last edited by DynaMeme; 03-13-2006 at 07:01 PM.
Reply With Quote Share with Facebook
  #6  
Old 03-13-2006
yachtvalhalla's Avatar
Cruise-aholic
 
Join Date: Feb 2006
Location: SE Asia
Posts: 46
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
yachtvalhalla is on a distinguished road
Good call, Chris (DynaMeme),

You've just described what happened to an older engine I had in VALHALLA. In my case, the carbon build up in the mixing elbow restricted the flow of water but not completely so I was fooled by the smaller amount coming out of the exhaust. This was cleaned out and the engine ran at normal temperature. But then the mixing elbow developed a hole in it, perhaps from a hot spot of carbon, and steam started pouring out. Replaced the mixing elbow and all was fine after that.

Terry
__________________
"Does the song of the sea end at the shore or in the hearts of those who listen to it?" Kahlil Gibran
Reply With Quote Share with Facebook
  #7  
Old 03-14-2006
Someday...
 
Join Date: Mar 2004
Location: NC, USA
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
ilnadi is on a distinguished road
Thanks everybody. based what I observed, the last two posts make sense. Would the elbow issue cause overheating (or at least the temp gauge to go off scale)? I think the steam may have faked the sensor but don't know enough yet. Boat is 2.5 hrs away, but I will check before I take it in for oil change, etc.
Reply With Quote Share with Facebook
  #8  
Old 03-14-2006
duffer1960's Avatar
Catalina 38 Avantura
 
Join Date: Aug 2000
Location: Michigan
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
duffer1960 is on a distinguished road
You also could have just blown an exhaust or intake manifold gasket somewhere.
__________________
Sincerely,
Russ Duff
Catalina 38, Hull #112
"AVANTURA"
Lake Erie
Grosse Ile, Michigan
Reply With Quote Share with Facebook
  #9  
Old 03-15-2006
Member
 
Join Date: Feb 2006
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
DynaMeme is on a distinguished road
Blown gasket is defintiely possible, but water leakage should be more evident in such case. And one would expect a lot more white "smoke" in the exhaust from unrestricted water flow into the hot gas stream. Still it's something to check after looking at the elbow.

On the elbow and over heating. The carbon restriction is what would cause the over heating because it blocks water flow. This can happen fairly suddenly as the carbon builds up in layers. Several of those layers can break partially free and clog things. When I replaced mine, I messed around with it to see what I was dealing with. It was so baked in it took a heavy wire "bottle" brush chucked in an electric drill to remove it.
Reply With Quote Share with Facebook
  #10  
Old 03-15-2006
duffer1960's Avatar
Catalina 38 Avantura
 
Join Date: Aug 2000
Location: Michigan
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
duffer1960 is on a distinguished road
Is it fresh water or raw water cooled (a closed or open system)?
__________________
Sincerely,
Russ Duff
Catalina 38, Hull #112
"AVANTURA"
Lake Erie
Grosse Ile, Michigan
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel consumption gas vs diesel jklewissf Gear & Maintenance 25 05-11-2013 07:28 PM
Diesel Stoves santeana Provisioning 6 02-26-2012 05:14 PM
Diesel vs 4 stroke outboard??? bugged Gear & Maintenance 21 11-28-2010 06:15 PM
gas vs diesel reid5009 Living Aboard 1 02-07-2003 12:43 PM
diesel tachometer diesel MHRitter Gear & Maintenance 1 09-17-2002 11:52 AM


All times are GMT -4. The time now is 12:30 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.