Water pickup tube for digital speedometer

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Any advice or even better a picture showing where the pickup is located? If the tube is cut or has a hole, replace the tube.

The volt, tach and trim gauge work and when I turn on the gauge lights they light up. This unit is not repairable by the consumer.

Fixing an outboard speedometer

Hi - I've got twin 1999 250 saltwater series. My problem is that my boat is in the water and water temp is 44degrees. Is there any way to visually inspect or diagnose the pickup tube location from on the boat. Both engines have a yamaha outboard speedometer pickup coming up but I can not locate where on the housing it is picking up the water. If I could locate it I could try and insert a drillbit to clean it out. Any advice or even better a picture showing where the pickup is located. My service yamaha outboard speedometer pickup does not cover this anywhere in the lower unit section. Also - would both engines be feeding the digital unit or just one. Thanks, Does leading edge mean right where it cuts the water at the front of the lower unit, or do you mean on the side somwhere. I think I what looks like should be a hole for water to come in on the port side of the engine below the cav plate. It's really awkward to get at though while hanging over the transom of the boat. Even from the dinghy it's tough. Sometimes there will be a splice in speedo hose where hose comes out of engine cowling. You may to blow through hose with about 30 psi air to clear pickup, if use too much air pressure it can pop hose off nipple in lower unit then you would have remove lower unit to put hose back on.

Speedometers are a lot of trouble if you leave your boat in the water for extended periods of time. The tube probably will be black plastic and thicker than most boat wiring. Available with black or white faceplate design. Stand in front of mirror and blow with your mouth into the inlet on the back of the speedometer. My service manual does not cover this anywhere in the lower unit section. Suddenly fishing beneath the boat, controlled drifting and waiting in place are a snap for captains of any skill level. The most common cause of speedometer failure is a plugged pitot tube. For more than 30 years, Yamaha Outboards have delivered far more than superior power, performance and efficiency.