www.iFourWinns.com

I've replaced the water pickup that was missing, flushed the hose so nice clear water spits out under power.... but the gauge only reads a max of 10mph and only at WOT. What's the next step? I have the basic VDO dash, not the crazy one.

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1981 Columbia 8.7
2015 Yamaha FZR - 87mph - sold
2006 Yamaha GP1300R - sold
2003 Chaparral 215 SSI - sold
2009 Stingray 195CS - sold
2000 Four Winns H180 - sold
1976 O'day Daysailer II - sold
Rick's Four Winns H180 Mods/Upgrade Thread

You can test a mechanical speedo by blowing compressed air into it. You can blow air into the hose at the pitot and then at the gauge to see if it is a restriction or bad gauge.

Greg

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2008 210SS 6.2L DTS Bravo 1 Now featuring MercMonitor w/SmartTow

My "crazy" VDO dash had a very accurate speedo, much more so than the Faria one with the pitot tube !

Graham

Oh the GD pitot tube. One of my pet peeves. How stupid I think the boat manufacturers are to have not given up on this silly antiquated technology that is fraught with problems long ago in favor of a gps speedo. I just go by rpms and feel and leave the damn pitot clogged with debris. If I need to know speed I use my cheap Tom Tom car gps. I guess some boaters need to know accurate current speed/ relative speed.

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2005 Horizon 250

I don't need to know, but if it's there it might as well work

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1981 Columbia 8.7
2015 Yamaha FZR - 87mph - sold
2006 Yamaha GP1300R - sold
2003 Chaparral 215 SSI - sold
2009 Stingray 195CS - sold
2000 Four Winns H180 - sold
1976 O'day Daysailer II - sold
Rick's Four Winns H180 Mods/Upgrade Thread

Look around and do a search. I and others have replaced the factory speedo (non-VDO) with a GPS unit. It's pretty important to have an accurate speed for wakeboarding. I actually have the dash mount, and a hand-held GPS as a basic map for night-time navigating. Others are using automotive ones, and the ones w/ fish-finders are very sensible.

As far as checking the one you have, I would disconnect the tube, and blow with air all the way through (looks like you've basically done that with water). If it still no worky, the gage is a little more sensitive, and I couldn't even guess what kind of pitot pressure would correspond to speed. May be worth finding a shop that does work on that sorta thing. Keep in mind, a GPS speedo gage replacement would only set you back around $100.

Best of luck!

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Walt B
"Debt-Charged"
Black '07 H210SS
6.2L Bravo One turning a 21P HIFive
Wakeboard Tower with Perfect Pass Stargazer version
Missouri River; Kansas City, Mo.

They never work right & have been know to be wrong most of the time. A GPS unit or GPS speedo is the way to go!!