Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 16-06-2020, 10:26   #16
Registered User

Join Date: Jun 2019
Location: Rochester, NY
Boat: Chris Craft Catalina 381
Posts: 737
Re: Whatís with dummy lights?

Quote:
Originally Posted by a64pilot View Post
So why do boats have tachometers? Those of you that donít want gauges, why do you want a tach?
As much as it's not ideal, a tach is the best way we've got on most boats to set an engine to an approximate target power level.
__________________

rslifkin is online now   Reply With Quote
Old 16-06-2020, 10:31   #17
Registered User

Join Date: Oct 2014
Posts: 3,209
Re: Whatís with dummy lights?

Say what! You mean your boat doesn't come with a universal Check Engine Soon light?

I prefer to install audio alarms so as to be made aware if sensors indicate that things are going off kilter and then to be able to go view the gauges to determine which issue is raising an alarm. As to oil pressure, I often see a wide variance in pressures across similar engines, not sure if it is the gauges that are reading incorrectly or just large variances in actual pressures. I get concerned when I see the pressure drop below what is customary for the specific engine, say, e.g., shifting from 25 down to 10 psi.
Attached Thumbnails
Click image for larger version

Name:	check engine light.jpg
Views:	17
Size:	34.6 KB
ID:	217482   Click image for larger version

Name:	chengine.PNG
Views:	15
Size:	382.7 KB
ID:	217483  

__________________

Montanan is offline   Reply With Quote
Old 16-06-2020, 11:42   #18
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 8,679
Re: Whatís with dummy lights?

Quote:
Originally Posted by NorthernMac View Post
Iíve seen quite a few posts about people saying once the low oil pressure light came on.

Why donít more people install and insist on having a oil pressure indicator?

I mean for me I feel odd not having CHT/EGT for each cylinder, but I get it, itís a boat, still not having oil pressure to match against RPM and temp, plus the lack of folks who cut their oil filters and inspect the eminent on oil changes..

Iím all for adventurous, but dang
A sending unit for a gauge can give You ulcers when it goes erratic. I'd rather have one than a light.
Cadence is offline   Reply With Quote
Old 16-06-2020, 11:59   #19
Registered User

Join Date: May 2011
Boat: Hitchhiker, Catamaran, 40'
Posts: 791
Re: Whatís with dummy lights?

The idiot light gives you a way better chance of shutting down in time if there is a sudden problem. I would choose a light over an oil pressure gauge. A temp gauge is essential but would be nice to have the light as well As for the alarm, not loud enough to hear over the roar of both engines on Thumbs Up! I also have overheat alarms on the exhaust but are nowhere near loud enough.
Thumbs Up is offline   Reply With Quote
Old 16-06-2020, 12:08   #20
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2017
Location: Annapolis
Boat: OíDay 34
Posts: 58
Re: Whatís with dummy lights?

The answer is: when boats start to fall out of the sky, weíll all have CHT/EGT gages. If youíre used to scanning in an airplane then scanning in a boat isnít that much different.
LouK is offline   Reply With Quote
Old 16-06-2020, 12:35   #21
Registered User

Join Date: May 2011
Boat: Hitchhiker, Catamaran, 40'
Posts: 791
Re: Whatís with dummy lights?

Might as well install some. More bells and whistles!
Thumbs Up is offline   Reply With Quote
Old 16-06-2020, 12:44   #22
Registered User

Join Date: Nov 2018
Posts: 61
Re: Whatís with dummy lights?

Gauges. We donít need no stinking Gauges!
keyway is offline   Reply With Quote
Old 16-06-2020, 12:51   #23
Registered User

Join Date: Mar 2017
Location: Los Angeles, CA
Boat: Westcoast Bayrunner 20 Fishing Skiff
Posts: 66
Re: Whatís with dummy lights?

a64pilot always has great comments...
Idiot lights are for... wait. Idiots and those who are distracted by inattention, too much attention, or by hostile current events. Boats are all operated by people who occasionally sound brave at the bar in the yacht club, but I prefer to sail with someone who has known FEAR and admits to ignorance.
I used to help teach a class with a real professional engineer and master mechanic. Class title was "Care and Feeding of small diesel engines for marine use". We also had one for the building engineers with a similar title. The object was to teach maintenance and operation as well as the basic theory of the diesel engine. It was pretty fun to hear the stories of those who had problems thinking operation of a vessel at sea was as simple as the key ready Mercedes sedan being used to go to the market. Very few gasoline engines will take the continuous operation with reliability that can be obtained from a diesel. I once built a Healy and drove from Los Angeles to New Orleans in about 26 hours. Mostly my foot was pushing a dent through the floor. My eyes were in constant scan across the instruments and looking for those who are most absent today - law enforcement. You want to be able to exceed normal limits you must be built to the task and prepared ahead of time. Rehearsed.
Eyes ears and nose. The feel of the vessel through feet and hands. Experience and education. The KSA's. Know your vessel and your own limitations.
Crusty Joker is offline   Reply With Quote
Old 16-06-2020, 12:51   #24
Registered User

Join Date: Apr 2013
Posts: 7,670
Re: Whatís with dummy lights?

Quote:
Originally Posted by a64pilot View Post
So why do boats have tachometers? Those of you that donít want gauges, why do you want a tach?
On twin engine boats, it's really nice to keep the engines sync'd.

On single engine boats...not much point.

We've had tachs on our twin engine boat and not on our single engine boats.

I like gauges but I don't know that I would pay a lot more to get a gauge package if buying a boat.

PS: I believe Icon comes from Eastern Orthodox tradition. There is a very specific way of "writing" them, so in principal the same Icon should always look the same...hence just a glance and you recognize them. In the same way a computer icon should be simple and consistent and recognized with just a glance.
valhalla360 is offline   Reply With Quote
Old 16-06-2020, 13:09   #25
Registered User

Join Date: Dec 2014
Boat: Searching for the next one...
Posts: 30
Re: Whatís with dummy lights?

Quote:
Originally Posted by Thumbs Up View Post
The idiot light gives you a way better chance of shutting down in time if there is a sudden problem. I would choose a light over an oil pressure gauge. A temp gauge is essential but would be nice to have the light as well As for the alarm, not loud enough to hear over the roar of both engines on Thumbs Up! I also have overheat alarms on the exhaust but are nowhere near loud enough.
Agree! - and just to clarify - I am a strong advocate for having gauges, however, that is always IN ADDITION to lights/alarms for low Oil pressure/High temp. I am also a pilot, and while i understand and would conduct near constant instrument scans in an airplane - while in a boat, we’re not strapped into a seat right in front of the gauges. There are multiple reasons we move about the boat, especially while Otto’s helming, to say nothing of going below to grab a drink or use the head. Returning to the helm after several minutes of a problem could be costly.

The other problem with these warning lights on boats (I’ve never called them “idiot lights”) is frequently the light is located somewhere below my knees - like right next to my ankle! Great for viewing on a sunny day!
Phyrcooler is offline   Reply With Quote
Old 16-06-2020, 13:21   #26
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,569
Re: Whatís with dummy lights?

Don’t most twins have auto sync now? If not I always sync’ d by ear. Your ear is more accurate than a tach for synchronizing.
Point is a tach is no more essential than a water temp gauge or oil pressure gauge, you can’t over rev the engine, there are no gears to shift, what’s the need for a tachometer?
Actually they are about the most useless gauges you could have, because they monitor something that really doesn’t need monitoring, exception I guess being if you have a cone clutch transmission, yet no one it seems would dare sell a boat without a tachometer.

I think it’s like the Miata’s oil pressure gauge, it’s a sorts car and all sports cars must have an oil pressure gauge, but most Miata buyers aren’t really “Sports car” types so you give them something that they think is an oil pressure gauge, but won’t worry them like a real oil pressure gauge will.
Same car has a water temp gauge, and it sort of works, but has what Piper aircraft calls a “snap” function, meaning when you get close to the expected reading, it will go there and hold that expected reading unless you go way above it, then it becomes live again.
So once you get close to warmed up the water temp gauge never moves, but of course the water temp does.

They went to a lot of trouble to placate the uninformed, and of course tick off the informed, but that’s to be expected.
a64pilot is offline   Reply With Quote
Old 16-06-2020, 13:32   #27
Registered User

Join Date: Apr 2013
Posts: 7,670
Re: Whatís with dummy lights?

Quote:
Originally Posted by a64pilot View Post
Donít most twins have auto sync now? If not I always syncí d by ear. Your ear is more accurate than a tach for synchronizing.
On new boats they auto sync but not on a lot of older boats. I'm sure if you are buying a new $400k boat and you tell them you want certain gauges, they will put them in.

Your a better man than I sync'ing by ear on a pair of roaring V8s (I suspect a couple of small 1 lung diesels put-putting along would be even harder).

I could get close but if I centered the wheel and let go based on sound (calm day, no wind or current), it would drift off to one side or the other. If I matched the tachs, it would stay straighter, which I assume means the thrust is pretty much equalized.
valhalla360 is offline   Reply With Quote
Old 16-06-2020, 13:35   #28
Registered User

Join Date: Mar 2017
Location: Los Angeles, CA
Boat: Westcoast Bayrunner 20 Fishing Skiff
Posts: 66
Re: Whatís with dummy lights?

I use a digital or hand held mechanical tach when I set the output power and max RPM on an engine using the fuel pump... I enjoy having lots of instruments to observe details about engine function over time. Some fuel metering devices I have come in contact with are more than $50,000, a tenth of the value of the engine and its purpose at installation. That said, most people do not require much in the way of instruments. Temperature gauge is preferred over idiot light, alarm is a good idea as an extra. Oil pressure gauge is preferred over idiot light, but low oil pressure alarm is a good idea as well. One thing I can add here is that the idiot operating the vessel should be at the helm when underway, in command, not chasing an imitation admiral below deck... Several stories have been told about captains running into the local islands while doing a refill on the coffee cup. The most important item on the boat skippers list should be his head. The one on his shoulders. Stay sober until docked or moored and all are safe. Peace Prevails by Intention.
Crusty Joker is offline   Reply With Quote
Old 16-06-2020, 14:09   #29
Registered User

Join Date: Jun 2019
Location: Rochester, NY
Boat: Chris Craft Catalina 381
Posts: 737
Re: Whatís with dummy lights?

I sync my twins by ear, but it's much easier if you can get them close with the tachs first. If you know you're within 50 rpm or so, it's usually just a small tweak or 2 to get them synced.
rslifkin is online now   Reply With Quote
Old 16-06-2020, 14:15   #30
Registered User
 
NorthernMac's Avatar

Join Date: Mar 2019
Boat: A185F, Mystic 30’ Cutter
Posts: 624
Re: Whatís with dummy lights?

I was debating installing a master caution on the boat, but I cant figure out a easy way to do it and don’t want to get too crazy on my little 2 cylinder diesel lol

That said it failing at the wrong time could kill me just as dead as the pratt shitting the bed
__________________

NorthernMac is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dummy Lights - Which should Be On? Yanmar 4JH4 solecollector Engines and Propulsion Systems 1 02-09-2018 11:54
Want To Buy: Wanted- Dummy Plug for Standard Horizon Knot Log Impeller sww914 Classifieds Archive 2 07-01-2012 11:05
Dummy! Extemporaneous Deck hardware: Rigging, Sails & Hoisting 32 01-04-2009 19:56
Check the Oil, Dummy! SabreKai The Sailor's Confessional 20 21-03-2009 22:03

Advertise Here


All times are GMT -7. The time now is 05:37.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.