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Author Topic:   Speedometer Tubing

walf posted 01-25-2013 03:56 PM ET (US)
The speedometer tubing coming off the [gearcase] of my Mercury outboard came loose. I have speed [measurement] on my [GPS receiver]. Since I do not use this tubing, do I have to reconnect it?
Binkster posted 01-25-2013 09:53 PM ET (US)
No, if your worried about water leaking into your gearcase, ease your mind, its impossible. Since your not using the speedo, get rid of all the tubing. Of course, now your speedo is sitting in your dash panel, not working. I would reattach the tubing or replace it with new, so at least the speedo is working, even though its not accurate.
rich
walf posted 01-26-2013 02:54 AM ET (US)
I do not have a speedometer on my dash panel.
jimh posted 01-26-2013 09:29 AM ET (US)
Moved to REPAIRS/MODS
Tom W Clark posted 01-26-2013 10:29 AM ET (US)
The pitot tube built into the gearcase will squirt a stream of water upward if you do not cap the barb the speedometer tubing attaches to. The normal was to do this is to leave a short length of the tubing on there, bend it over 180 degrees and secure it with a plastic zip tie. You can also insert a plug into the this short stub of tubing.
Powergroove803 posted 02-05-2013 12:58 PM ET (US)
The reverse will happen if the tubing is loose from the dash side, at least for the water temp tubing. All summer we wondered why there was warm water coming acroos our feet. I could never find the end of the tubing until i cleaned out the interior of the CC and found one little extra tube....

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Author	Topic: Speedometer Tubing
walf	posted 01-25-2013 03:56 PM ET (US) The speedometer tubing coming off the [gearcase] of my Mercury outboard came loose. I have speed [measurement] on my [GPS receiver]. Since I do not use this tubing, do I have to reconnect it?
Binkster	posted 01-25-2013 09:53 PM ET (US) No, if your worried about water leaking into your gearcase, ease your mind, its impossible. Since your not using the speedo, get rid of all the tubing. Of course, now your speedo is sitting in your dash panel, not working. I would reattach the tubing or replace it with new, so at least the speedo is working, even though its not accurate. rich
walf	posted 01-26-2013 02:54 AM ET (US) I do not have a speedometer on my dash panel.
jimh	posted 01-26-2013 09:29 AM ET (US) Moved to REPAIRS/MODS
Tom W Clark	posted 01-26-2013 10:29 AM ET (US) The pitot tube built into the gearcase will squirt a stream of water upward if you do not cap the barb the speedometer tubing attaches to. The normal was to do this is to leave a short length of the tubing on there, bend it over 180 degrees and secure it with a plastic zip tie. You can also insert a plug into the this short stub of tubing.
Powergroove803	posted 02-05-2013 12:58 PM ET (US) The reverse will happen if the tubing is loose from the dash side, at least for the water temp tubing. All summer we wondered why there was warm water coming acroos our feet. I could never find the end of the tubing until i cleaned out the interior of the CC and found one little extra tube....