www.iFourWinns.com

I know boat speedometers are flakey but nine days? Got the boat to WOT for the first time today and the needle barely reached 20 mph. FYI, the engine is a 2015 ETEC 135 H.O.

I'm sure it's just debris or something, and it's a warranty repair, but still. Am I expecting too much?

If it's a water/air pressure style speedo they rarely work consistently. Mine sometimes works but t just use the GPS on the Garmin.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

You aren't expecting too much....probably debris but I would want it repaired too. Speedos aren't that much off...Ipersonally don't care to know exact sped and my speedo was only a few MPH different than GPS during the one time I checked it.

I go by rpms anyway and don't really care if I'm going 41 or 43 MPH. Same with my vehicle...as long as its close im good.

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http://i1339.photobucket.com/albums/o71 ... wqm355.jpg


08' H210SS
VP 5.7Gi

These speedometers measure water pressure ramming into the front of your lower unit. There is a little intake hole there where the water enters. Running into any weeds, plastic, etc can block or plug the hole. Not really a warrantee issue at all.

Disconnecting the tube and blowing back through it will usually clear the blockage. Use mouth pressure, or low pressure from air compressor or bike pump (less than about 25psi). If that doesn't do it, you might need a small wire to fish out the hole.

Here is a lot more information specific to your engine:
http://www.marineengine.com/boat-forum/showthread.php?386442-etec-115-speedometer

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"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings