gauges

I've seen some on ebay but they only go to 50 mph.

Check with hspore (Heath) on this site. He had 2 for sale. Topic-parts for sale,(page 2) ebay airguide speedos.

almost totally sure.how can i check?

ok i might be goin out to the lake for the weekend so i might be able to check.dont the gauges work on peto tubes which run off air?why would they be squirtin out water?

ahh ok stupid question but where does that water return to after it moves that needle?

Actually, the speedos work on air pressure. the water simply compresses the air in the line. It is best to keep the water out of the speedometer(s). The airguide stabilizer tube works via air pressure to remove needle bounce/fluctuation. Water is a non-compressible, so if water got into the tube, it would do nothing to remove the needle fluctuations. Thus the main reason the stab. tubes are mounted vertical...to drain any water that works its way into the line due to air leaks.

wow u guys just saved me some $$$ because i did that earlier and the needle moved so i guees i have bad hoses?

Well, I suppose you could be correct, but it just does not make sense to me. If you are correct, then there is no need for the stabilizer tube as water is a non-compressible as I stated before. I will look at my spare (and disassembled) airguide speedos tonight and refresh my memory, but I seem to remember that the speedo works just like a tire pressure gauge in that the air pressure tries to straighten a curved copper (or similiar metal) tube/chamber. A little chain is hooked to the end of the air tube/chamber that pulls the needle around its pivot point. No diaphram that I can remember.

Also, on my boat, the stabilizer tubes are mounted high on the inside of the transom. Far enough away from the pitots that water will not make its way to them...but just in case it does (due to an air leak), they are mounted vertical.

Wow!! Water and fire in complete agreement. Never thought I would see the day.
David and 79 do you guys have a warm fuzzy feeling???

[QUOTE=79nautique] this is going to be rough, backing up Dave,<snip>QUOTE]



Will:
disconnect the hose from teh back of the speedo. Connect a short piece of hose and apply regulated (like from a bicycle pump) air pressure. Not too much or you might damage the speedo, so maybe an air compressor is not a good idea. If the speedo needle moves around the dial the more pressure you add, then it is working and you need to fix or replace the hose from the pitot to the speedo.

I seem to remember someone posting speed readings for a given air pressure. I printed it, but cannot seem to find it now. Maybe do a search.

If the speedo does not work, you can open it up an find out why. Might be a rupture air tube do to freezing or corrossion. Might just be stuck mechanicals. To open up the speedo unit, roll it back and forth on the work table while apply pressure on the bezel with the palm of your hand. Eventually, the bezel will seperate from the body. they are not glued together.

Let us know what you find out.

also remove the rear seat and back panel and take a look at the balance tubes on either side of the gas tank mounted on the transom. Make sure there isn't any bulges in the metal tubes and that the lines are connected and not dry rotted. Take a small piece of wire and run through the openings of the pitote to clean them out, put a wrench on the nut where the tube connects to the pitote and make sure it's tight, don't strong arm it it's just plastic. Also take an allen wrench with you and tighten the small screw in the face of the dial, center lower part of glass with rubber gromet, incase someone has backed it way off that is how you adjust the needle for it to rear the right speed.

will try this take a empty clear straw, put your finger over the end of it to seal it and see how far you can blow water up into and that will give you your physics lesson for the day.

not exactly

its more the amount of pressure it takes to compress air in a given space not how much pressure it takes to expand something. The diaphram has a spring rate to it and gives some but is not realvent it is the force applied against the air and the force the compressed air applies to the diaphram.

dude your bringing down agreeing all of the time