Truspeed Speedo Hook-up

Evinrude Boater

Lieutenant Junior Grade
Joined
Jul 6, 2004
Messages
1,144
I have a Truspeed speedometer on my fiberglass runabout but the tube on the back of the speedo has been cut off leaving about a foot sticking out. I'd like to get it hooked up again but I'm not sure what kind of pick-up it requires. Is there a universal fitting that connects to the tubing and does it have to go through the hull?<br />
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cajun555

Chief Petty Officer
Joined
Dec 20, 2003
Messages
483
Re: Truspeed Speedo Hook-up

classicboater, if the hose has been cut off and is not long enough to reach the nipple on the back of speedo just splice tubing back together. You should have a pitot tube on the lower edge of transom that same tube is connected to. You might try blowing through tube from speedo end to make sure hose and pitot tube are clear. If you don't have a pitot tube on transom youcan get a kit on this site or your marine store. Has hose and pitot tube.
 

Mark42

Fleet Admiral
Joined
Oct 8, 2003
Messages
9,334
Re: Truspeed Speedo Hook-up

I have a vintage Truspeed Tachometer that matches that speedo. If you are interested, e-mail me at mjmullen4@yahoo.com<br /><br />Mark
 

dajohnson53

Lieutenant Commander
Joined
Apr 28, 2004
Messages
1,627
Re: Truspeed Speedo Hook-up

My guess is that this is a standard "pitot tube type" speedometer - as opposed to a paddle wheel type. This would mean the tube that has been cut off is a simple hollow tube. If this is the case....<br /><br />You'll need two things: a new length of tubing and a pitot tube.<br /><br />The tubing is available "everywhere". Certainly boat shops should have it, but also there are often specialty shops that sell all sorts of rubber and tubing products. This is where I've found mine in the past. Just take them a small sample, and get enough equivalent tubing to reach from your speedo around the boat (wherever you'll be running it), and out back of the transom. Get a few feet extra, it is cheap.<br /><br />The pitot tube is the sensor that is mounted on the back of the transom. This too is a fairly generic/ universal product and any boat shop or on line boating catalogue should have one.<br /><br />The pitot tube is mounted on the transom at the bottom so when in position, it will stick into the water running past the bottom of the transom when underway. My guess would be that you will find screw holes where the old one was - but check with the new one, it might be a slightly different size requiring new holes. <br /><br />The tubing can either run over the transom and down to the pitot tube, or through a hole in the transom (above the water line, usually), and down to the pitot tube. As I mentioned earlier, it plugs into the back of your speedo and around under the gunwhales, or wherever you run wires, etc. between the front and back of the boat.<br /><br />The tubing transfers pressure from the pitot to the speedo gauge. Therefore, it's critical that there be no sharp kinks or twists. That's the first place you will troubleshoot if it malfunctions. <br /><br />Good luck.
 
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