speed omitor stop working

[donaldm]

I/o 5.0 alpha one, merc. 2005. My speedometer stop working. I see a single black tub coming from the back side and center of the speedometer. I assume its not electrical but a presure control type. Where is the senser pickup? I rebuild the lower end out drive . . . so I'm thinking the pick up might be in the lower out drive by way of a small black tube I see, if thats it maybe I didn't get it back in right?

 

[Bondo]

Re: speed omitor stop working

Noticstar i/o 5.0 23 deck boat.

Ayuh,... This is the Motors, I/O forum,... We don't much care what the Boat is,..
We need to know What motor,+ What drive, made by Whom....

 

[Don S]

Re: speed omitor stop working

Along with the year.

 

[Tyablt]

Re: speed omitor stop working

Search part #56973p. This should be what you need for pressure type speedo. Mounts on transom.

 

[donaldm]

Re: speed omitor stop working

5.0 merc, alpha one, i/o, 2005, efi, closed cool system.

 

[Don S]

Re: speed omitor stop working

Raise the outdrive up and see if the hose is hooked up to the lower unit

 

[Rip Tide]

Re: speed omitor stop working

I had this problem too. If the tube was hooked up properly like Don S suggested, the problem may be a plugged pickup on the leading edge of your outdrive. I disconnected the hose and blew compressed air up through the pickup hole. I got about 1/4 cup of mud out. I then disconnected my speedo at the dash and blew back through the line, if you have a helper here, have them watch the tube going to the outdrive they can tell you when it blows clean. If you get no air at the rear then you have a line problem.
Good luck

Ryan

 

[bigred95stang]

Re: speed omitor stop working

I have same issue. I have made sure the tube is connected, the speedo works when blowing air up the tube, I have blown air back down the connector and it sounds like the air is escaping inside the unit (3.0L 1994 Baja, Alpha 1 gen 2). I just had the lower pulled to fix a leak on the shift shaft so I thought they might have fixed it but no luck there. Is there something in there that is missing?

Thanks,
Greg