Speedometer dont work...

C

CB1955

Recruit
Joined
Jul 28, 2010
Messages
5
Unfortunately we were out of town when a storm pushed our boat sideways and up on shore. After we rescued it and got it back afloat on a test ride, the speedo didn't read right. Once I had it back on the trailer I noticed a small tube had busted off a plastic fitting on the back of the stern drive. My question is this related? If so where can i purchase this plastic part?

Thanks
Stump
 
S

sje0123

Petty Officer 2nd Class
Joined
Jul 12, 2011
Messages
146
Re: Speedometer dont work...

Not sure about your set up exactly but it's called a pitot. Easily replaceable if a stand alone unit. Not sure if built in to stern drive.
 
Bondo

Bondo

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Re: Speedometer dont work...

CB1955 said:
Unfortunately we were out of town when a storm pushed our boat sideways and up on shore. After we rescued it and got it back afloat on a test ride, the speedo didn't read right. Once I had it back on the trailer I noticed a small tube had busted off a plastic fitting on the back of the stern drive. My question is this related? If so where can i purchase this plastic part?

Thanks
Stump
Click to expand...

Ayuh,.... That's probably the pitot tube, but knowin' What Drive sure would help...
 
Don S

Don S

Honorary Moderator Emeritus
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Messages
62,321
Re: Speedometer dont work...

I would have to guess you mean the stern of the boat, as there are no drives by any manufacturer with a plastic fitting on the back of the sterndrive.

Sounds like your hose broke on the pitot tube.
They look similar to this.

http://www.iboats.com/Boat-Parts-Ac...1073--submit.Search--submit.x.30--submit.y.14

50-15401_0.jpg
 
Z

Zeker

Cadet
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Feb 26, 2010
Messages
19
Re: Speedometer dont work...

A GPS, either an inexpensive hand-held or a marine unit, is an alternative to the mechanical speedometer. With a GPS you can read MPH accurately even on a very slow troll.
 
25thmustang

25thmustang

Lieutenant Commander
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Mar 20, 2008
Messages
1,849
Re: Speedometer dont work...

The plastic pitot in the photo above with the plastic hose coming off it sounds like the problem. I have the same thing on my Cruisers, and sure enough, no matter what I do, it comes off. Being such a small dia. hose, makes it tough to get any kind of fastener on it. Zip Tie didn't work for me.
 
Oshkosh1

Oshkosh1

Ensign
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Jun 8, 2009
Messages
968
Re: Speedometer dont work...

If your rubber tubing is coming off, then there's probably too much upward tension. See if you can create a little slack to put just a small "bend" in the line to actually put a little "downward" pressure on it. If that is not possible...use a drop of super glue at the base of the tube receptor.
 
tpenfield

tpenfield

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Re: Speedometer dont work...

CB1955 said:
I noticed a small tube had busted off a plastic fitting on the back of the stern drive. My question is this related? If so where can i purchase this plastic part?

Thanks
Stump
Click to expand...

There is a tube that goes into a plastic fitting on many of the Mercruisers for the speedometer. A little more info would be helpful. . . a photo would be awesome.
 
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