Reply
 
Thread Tools Display Modes
 
Old 09-22-2015, 06:39 AM   #1
Senior Member
 
David Hughes's Avatar
 
City: Marietta
Country: US
Vessel Name: True Love
Vessel Model: Leopard 37 PC
Join Date: Feb 2015
Posts: 128
Twins overheating at the same time- the great mystery resolved...

So the family and I were on our Leopard 37 Powercat , just leaving Shark River in the Everglades, on a trip to The Keys. Three miles offshore the overheat alarm goes off on the starboard motor. I immediately turn it off and continue on the port motor as I think about things. Not 30 seconds later the overheat alarm goes off on the port engine too.....I shut it down too. Hmmm ........

I can see, hear, nor smell anything wrong, and bilges are clean, coolant is full, strainers clean, water flow is fine, etc. After a rest, I start them up again and resume. Not 3 minutes later both alarms go off again within 30 seconds of each other. I wait again and try at very slow speed, whereby I get an extra 3 minutes before alarms.

So the riddle is what can cause both engines to fail at the same time? Could I have destroyed both impellers or sucked up plastic bags into the intakes? Sure didn't think so.

Well now we were adrift and at least 30 miles from cell phone service so I can't call anyone for advice. I try calling TowBoatUS on the VHF. Nothing. By the way, we have not seen another boat of any kind for 18 hours. This is the off season and we were way down on the southwest tip of Florida. Now I try calling anybody at all. Anybody. Nothing. After an hour, finally Coast Guard Sector Miami hears me and responds. They ask about imminent danger, medical conditions, ages of the children, etc, and I tell them we are fine, but need a relay to TowBoat. They do that, after getting CGSector Key West to listen in and take over. TowBoat drives 50 miles in 2 hours and pulls alongside. Now I should mention that low battery lights come on at the AC panel and I see that the house batteries are pretty low. Hmmmm again. Oh did I mention that also the RPM gauges on the helm stopped working? Important points in hindsight.

Things add up to something electrical, right? Long story short, turns out bolt V belts were found broken. These motors are electrically connected so that both batteries may be charged by running only one engine. So in the event one alternator fails, the other can take over. Here's the design flaw: if one v belt is gone, or one alternator failed, there is no warning system of any kind. You only know you have a problem when the other side fails.....

Live and learn!


David Hughes
2009 Leopard 37 Powercat for charter in Cape Coral, FL
Florida Catamaran Charter the "True Love"
__________________
Advertisement

__________________
David Hughes
2009 Leopard 37PC- Cape Coral, FL
David Hughes is offline   Reply With Quote
Old 09-22-2015, 06:42 AM   #2
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,525
Here's the design flaw: if one v belt is gone,

Warning system ,

EYEBALL Mark 1 Mod 0
__________________

FF is offline   Reply With Quote
Old 09-22-2015, 06:48 AM   #3
Senior Member
 
David Hughes's Avatar
 
City: Marietta
Country: US
Vessel Name: True Love
Vessel Model: Leopard 37 PC
Join Date: Feb 2015
Posts: 128
Agreed, but the belts are at the very inaccessible front of the motors, and behind covers so not visible without removing the covers. That, and I'm no mechanic.... : )
David Hughes is offline   Reply With Quote
Old 09-22-2015, 06:59 AM   #4
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,422
First thing do is remove those covers for good. Then you could add volt meters or indicator lights that read directly off each alternator.
Capt.Bill11 is offline   Reply With Quote
Old 09-22-2015, 07:28 AM   #5
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 2,739
Quote:
Originally Posted by Capt.Bill11 View Post
First thing do is remove those covers for good. .
Yes! Remove those covers. Or modify them with clear plastic panels so you can see inside.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 09-22-2015, 07:52 AM   #6
TG
Senior Member
 
TG's Avatar
 
City: Oceanside, CA
Country: USA
Vessel Name: Tera Grace
Vessel Model: Californian 42 LRC
Join Date: Oct 2012
Posts: 154
Good candidate for engine room cameras.
TG is offline   Reply With Quote
Old 09-22-2015, 08:27 AM   #7
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,369
Pardon me, but I'm going to nag. For starters, what are the engines and at what RPM are they normally cruised.

There are many things to go wrong on a boat. Power cats with virtually inaccessible engines add to the list of potential woes. Top it off with an owner who is "no mechanic" and stranded off shore during storm season provides the makings of a less than happy ending.

Some good suggestions have been offered up. The list though of things to be aware of is long. The engine maker has produced a list of things to service and check. For sure V belt servicing is on the list. In general, given the inaccessibility of the engines, the engine's to do and check list should be adhered to with a vengeance.

If I read this correctly the vessel is used for charter. I'd guess there is a very long list of operating and maintenance instructions. What does it say about engine checks in particular V belts?

Again sorry to nag,
sunchaser is offline   Reply With Quote
Old 09-22-2015, 09:37 AM   #8
Guru
 
City: Northport
Country: USA
Join Date: Aug 2015
Posts: 813
Looks like Yanmar 110's - all good questions above. Current hours on engines would certainly be an interesting fact.
smitty477 is offline   Reply With Quote
Old 09-22-2015, 09:54 AM   #9
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,422
sunchaser brings up a good point. And it appears you are paying a management company to take care of your boat. If they are not checking the belts because they can't be bothered to take off the covers, what else aren't they checking?

Imagine if that had happened to a charterer that has no more mechanical ability than you. And had his family aboard. Refund time.

I'd have a word with them about the maintenance schedule. And remind them that their check out/check in captain/s should be looking for those kind of things.
Capt.Bill11 is offline   Reply With Quote
Old 09-22-2015, 12:07 PM   #10
Guru
 
City: gulf coast
Country: pinellas
Join Date: Jun 2014
Posts: 2,199
How in the world would both belts break at the same time????????????
bayview is offline   Reply With Quote
Old 09-22-2015, 12:29 PM   #11
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,369
Quote:
Originally Posted by bayview View Post
How in the world would both belts break at the same time????????????
Maybe one belt had been broken for quite some time? Failure of remaining belt triggered a good look at both sides.
sunchaser is offline   Reply With Quote
Old 09-22-2015, 12:31 PM   #12
Guru
 
hmason's Avatar
 
City: Westport, CT
Country: USA
Vessel Name: Magic
Vessel Model: Grand Banks 46 Europa
Join Date: Aug 2013
Posts: 1,901
Quote:
Originally Posted by bayview View Post
How in the world would both belts break at the same time????????????

Bilge ferrets.
__________________
Howard
Magic, 1996 Grand Banks Europa
Westport, CT and Stuart, FL
hmason is offline   Reply With Quote
Old 09-22-2015, 12:42 PM   #13
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 3,887
If that is a Yanmar 4JH, good chance the engines cooked pretty badly with belts off. Temp sensor is not directly on cyl head so it takes a long time for heat to soak to sensor once belt breaks.

See if paint is "browned" on cylinder head.

Yanmar V-belts have been a weak spot on several of their models. They like to eat belts.
Ski in NC is offline   Reply With Quote
Old 09-22-2015, 03:52 PM   #14
Guru
 
Xsbank's Avatar
 
City: Pender Harbour, BC
Country: Canada
Vessel Name: Gwaii Haanas
Vessel Model: Vancouver Shipyards Custom Aluminum 52
Join Date: Sep 2013
Posts: 2,447
"Yanmar V-belts have been a weak spot on several of their models. They like to eat belts."

Remind me to choose a Yanmar for my next marine engine. How impressive.

Or maybe a VW...
__________________
Don't believe everything that you think.
Xsbank is offline   Reply With Quote
Old 09-22-2015, 05:54 PM   #15
TF Site Team
 
dwhatty's Avatar
 
City: Home Port: Buck's Harbor, Maine
Country: USA
Vessel Name: "Emily Anne"
Vessel Model: 2001 Island Gypsy 32 Europa (Hull #146)
Join Date: Sep 2008
Posts: 2,733
Quote:
Originally Posted by hmason View Post
Bilge ferrets.
Yup. Bad news. Almost as bad as polyester mites.
__________________
David Hawkins
Deer Isle, Maine
dwhatty is offline   Reply With Quote
Old 09-22-2015, 09:05 PM   #16
Senior Member
 
David Hughes's Avatar
 
City: Marietta
Country: US
Vessel Name: True Love
Vessel Model: Leopard 37 PC
Join Date: Feb 2015
Posts: 128
Ok all. Here's more info: motors are Yanmar 110's with 2600 hours on them. And as someone wrote, they are very difficult to access. Yanmar guy who fixed them was certain those covers had NEVER been off. He also agreed it's best to just leave them off. Service manual says change V belts every 1000 hours. Another black mark on The Moorings for their poor preventive maintenance.

Don't think they got too hot. Paint isn't discolored. They were checked pretty thoroughly by the Yanmar tech and they also ran just fine all day today taking the boat back to home port.

The stock Yanmar instruments don't have gauges for temp, or oil pressure, or battery; just warning lights and alarms. I'd like to install actual gauges so I could monitor myself.

Thanks for the input everyone.
__________________
David Hughes
2009 Leopard 37PC- Cape Coral, FL
David Hughes is offline   Reply With Quote
Old 09-22-2015, 09:54 PM   #17
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,369
Mr Hughes

Thanks for sharing and glad it all worked out. Good to see you got right in it.
sunchaser is offline   Reply With Quote
Old 09-22-2015, 10:41 PM   #18
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 3,887
If engine did not blow out it's coolant, it probably did not get too hot. If hot enough to damage engine, steam forms in coolant jackets and blows it out all over engine room and into bilge. If only a little lost, probably ok.

And yes, sh!tcan belt guards if it makes it hard to access belts. Only keep them if they are truly improving safety, like front of engine is open to contact you if in engine room.
Ski in NC is offline   Reply With Quote
Old 09-22-2015, 11:15 PM   #19
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,422
Quote:
Originally Posted by hmason View Post
Bilge ferrets.
That is exactly why I prefer bilge weasels.
Capt.Bill11 is offline   Reply With Quote
Old 09-22-2015, 11:18 PM   #20
Guru
 
N4712's Avatar
 
City: South FL
Country: U.S.A
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,613
Quote:
Originally Posted by Capt.Bill11 View Post
That is exactly why I prefer bilge weasels.

I must ask what do bilge weasels do?
__________________

__________________
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
N4712 is offline   Reply With Quote
Reply

Thread Tools
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





All times are GMT -5. The time now is 11:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012