TEMP GAGE PROBLEM

larglo · Post by **larglo** » Fri Nov 20, 2009 4:41 pm

Hi all,

I just installed the new temp sending unit in my 318 engine. I ran a new wire from the gage (sender post) to the sender, therefor making sure it was wired correctly.
I the started the engine and waited for it to heat up. After a few minutes I could see the gage needle rising. I was sure happy to see I got the gage working,,,,,but it kept right on rising till it went pass the 220 deg mark. I got down and felt the engine to see how hot it was. The engine was not hot on any place I touched. I then turned off the engine and the needle started to fall and stopped arouind 160 deg aprox. and stayed there.

I got the sender unit at west marine, but don't know what the range is for it is, if any?

Does anyone know what may be wrong. From what I can tell, three of the 4 gages I have may have come with the boat. (1980 F25) At the bottom of each of the 3 gages,, it has a circle with the letters AC inside the circle.

Thanks for any help, cause I'm at a loss as to what may be the problem

Larry

larglo · Post by **larglo** » Fri Nov 20, 2009 4:58 pm

One other thing. I bought a new oil pressure sending unit, it's a Faria, up tp 80 lbs.
Will I now have to buy a Faria oil pressure gage too?

Larry

koviak · Post by **koviak** » Fri Nov 20, 2009 5:45 pm

Larry, most sending units and gauges are a matched set. Quite possible your ohms value of the new sensor is different than the original.

prowlersfish · Post by **prowlersfish** » Fri Nov 20, 2009 6:18 pm

The senders need to match the gauges other wise you get false reading like you have

TADTOOMUCH · Post by **TADTOOMUCH** » Fri Nov 20, 2009 10:42 pm

Gauges and senders must match. Also make sure if you have a dual helm that the sender is for a dual gauge set up.

larglo · Post by **larglo** » Sat Nov 21, 2009 9:54 am

I have heard that the gage and sender must be matched. But I have yet to see a site, such as West Marine give any info on matching the gage to the sender.
Know where in the discription do I see any info about what sender is needed to match the gage I am buying and visa versa.

If anyone knows of any marine sites that do this, please let me know. I want all my gages to match if possible. But none of the sites I have been on sells the gage and sender together.

Thanks, Larry

larglo · Post by **larglo** » Sun Nov 22, 2009 8:29 am

I went to West Marine yesterday (Friday) and bought 4 new gages. They assured me they would work with the senders I bought earlier from them.

I also bought a 6" inspection hatch that I will install on the floor, over the gas tank sending unit, in case I have to change it.

This spring I will buy an 8" inspection hatch to install on the bow, to act as an exhust for the 110 AC I'm installing, where the door going into the anchor rope storageis.

Will get new gages next week and hope I get warm enough weather to get them installed.

Larry

ready123 · Post by **ready123** » Sun Nov 22, 2009 8:44 am

larglo wrote:This spring I will buy an 8" inspection hatch to install on the bow, to act as an exhust for the 110 AC I'm installing, where the door going into the anchor rope storage is.Larry

Do you have a generator on board to run this AC while away from the dock? Will you be running the genny while you sleep?
If no genny why not consider putting the AC somewhere else so you don't have to carry it around when not using it.
I also have concerns that by exhausting the moisture into that small area you will get high condensation behind everything in your boat!
I think that is a very bad place to put the AC..... have you considered that warm moist air is being put into that space and it is not a sealed 'tunnel' to the outside through the deck vent.
I think moist air will pass backwards to behind your side panels in the berth.... which should be cooler on the inside and so cause condensation on the backside, mould growth, then contaminated air being breathed, then lung problems!!!!

There was an earlier thread on this same situation and the person then agreed it made more sense to have a dockside portable unit piped in as he would only use the AC on shore power while docked.
Oh, also consider this: do you have an onboard electrical system that can support the load of the AC while running other electrical things? The onshore unit can use a non boat AC circuit.

larglo · Post by **larglo** » Sun Nov 22, 2009 10:59 am

Michael,

I wonder if I could make an exhust fan, similar to the engine exhaust fan used in getting fumes out of the bilge? I could design it so the hatch could be placed over it when not in use. Perhaps an exhust fan similar to a kitchen wall exhaust fan.
I mainly will use AC while at the dock. I don't have a generator,,,,yet! I have been avoiding a gen. because of the noise involved.
I'm going to do a Google search to see what I find.

Larry

ready123 · Post by **ready123** » Sun Nov 22, 2009 1:46 pm

Larry,
Spend some more time really thinking about this need for an AC. If you don't need it while at anchor why have it permanently mounted in the boat. Do you really need one at all? Do you spend that much time at the dock to need it there? Can one anchor out in locations where the water temp and breezes in fact make the need for AC go away?
If it is really for at dock use why take it around with you when away from the dock... cost of fuel to move it, potential rode snags in the anchor locker and moisture buildup.
I am not going to agree with any modification to allow for an onboard AC that vents into the anchor locker... especially when it is not of a marine design that uses the heat transfer at coils that are placed correctly so as not to have any negative effects.
Have you looked at maybe how you can get more natural airflow through the boat while at anchor? There are lots of tricks that don't require much expense that solve heat buildup.

On a personal note... I have been smiling to myself these last few months since your initial arrival when you were wanting to use a light anchor and staying away from the expense of a windlass... you now seem to have 'fully' joined the boaters life of adding new purchased items to the boat as something to do.

Why not sit back and enjoy getting out on it for a year or two... improve your skills and the kind of boating you do (putting the money into fuel) and then you might find that these items are not necessary.

Just a different way of looking at it.... oh and by the way it does get pretty hot up here in the Great Lakes in Summer and I have found that smart selection of anchorages negate the need for an AC. I stay away from those tranquil spots that have dead air spaces.

prowlersfish · Post by **prowlersfish** » Sun Nov 22, 2009 5:37 pm

a A/c stuck in the ancour locker won't work asume youy talking about a window type unit . you lots of air flow the back of the unit a lot more then a blower will give you . it would work for about 2 minites and then quet cooling as the heat will have no where to go

how about one of these ? ( you can find them at lowes or home depot) http://www.portableacshopping.com/portable_ac_7500m.htm

or this it fitts thru a hatch ( you can find them used on crigslist some times
http://www.westmarine.com/1/1/24686-car ... e-air.html

You could also put one thru the bulkhead in front of the pass seat won't look the greatest but will do the job .
or do what Ken did put one thru the door . ( sounds crazy but it worked )

As far as needing a a/c if you think you do then you do need one . We could not cruse in the summer with out one

prowlersfish · Post by **prowlersfish** » Sun Nov 22, 2009 9:18 pm

Heres the door A/C
http://www.trojanboats.net/wforum/viewt ... 9718#19718

BTW he has a summer and winter doors .And before someone asks there is no heater on the winter door .

larglo · Post by **larglo** » Mon Nov 23, 2009 9:46 am

I think I'll take Michael's advice and put the A/C on hold for now. I bought this boat in July and put it in a slip where Larry Jr and I, had our 24 ft pontoon. The slip had 2 boats in each, and the Trojan could just barely fit due to her 9' 4 " beam,
so I never took it out of the slip, for fun fearing I'd hit the boat next to me getting her back in the slip. I worked on the boat thru Aug.

I then got a 30 slip at a different marina in Oct which had walkways on both sides of the boat, and having a 12' wide slip, and no sharing of slip.

I now, can't take her out, having the fuel, temp, oil, gages not working.
So to make a long story short, I will put the AC way down on my list to do, if ever, things on the boat.

I will instead concentrate on getting the gages working, then just sit back and enjoy Ms Glory, and get to know her.

Thanks very much for all of your comments and advise. They have been a great help!

Larry

larglo · Post by **larglo** » Wed Dec 16, 2009 9:57 am

Of the four gauges and sending units I bought from West Marina, I now have two gauges working. The temp gauge and the fuel gauge, are now working

I now only have to get the oil pressure gauge working. The volt gauge always worked, But I got a new gauge anyway, so all four, and the tech gauges would match.

This is only mid Dec and already I'm having withdrawal symptoms from not being able to do much on/with our boat!

Only had one day, in the last few weeks, that was warm enough to do anything, which was working on the gauges. If it's much below 60 deg's, my old bones just can't handle it.

If I knew 20 years ago or so, that I would have a boat, I think I would have moved to a location where I could be on the boat everyday, even during the winter.

But I know we''ll have some warm days this winter here in TN, just not enough of them.

Thanks all

Larry

randyp · Post by **randyp** » Wed Dec 16, 2009 11:12 am

Hi Larry

It could be a lot worse. You could be living in upstate NY. The warm winter days occur here in mid June.......

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