My depth finder loses its depth reading at about

Happens on a lot of units if you are going at high speed and the depth finder isn't getting a return echo because of water splash or not being over the return ping when it comes bk... a lot of time you can adjust the transducer to shoot slightly in front of the neutral position or adjust the whole unit down so it's deeper in the water. You'll have to play a bit.

Hey Joe,
Wow.. where to start.. there are so many things that will cause the issue you are describing.What type of electronics do you have? Does this happen at all speeds? Where is the transducer mounted? I need more info about when it stops reading.
1.Wrong setting on the unit
2 Bad transducer
3 Bad transducer mounting (either inside the hull or outside the hull.)
4. (In hull) Turbulence going under the boat (mine quits reading at about 55 mph @ half trim...the boat is lifting so much it causes air pockets so the transducer loses contact with the water)
5. (Outside hull) Turbulence around the bottom of the boat where the transducer meets the water.
Good luck,, when you get the info.. reply to me..

print users manual for Humminbird Pironha Max 160 Fish go to this link http://store.humminbird.com/media/document/PiranhaMAX_150-160-170-180-190c.pdf

When my depth finder acted like this I found out it was the sender that had not done well over the winter and was giving me false readings especially when the boat was at speed. The sender and cable only cost around 30 or $40. The hard part was since I have a pontoon boat getting under the Pontoon and replacing the wire in the spring when the water was cold.

If your boat is in the water ?? check contacts for corrosion as first step

What you are experiencing sounds like air bubbles crossing the face of the transducer. If you have a transom mount transducer check the face of the transducer. Make sure that it is clean. Also make sure the front of the transducer is a tiny bit lower than the back. The digital readout on the screen will only happen when you have a strong signal of the bottom.

I own a 1995 Four Winns and what you need is a Lowrance LSM-1 depth finder unit. It accepts the two pin lead from the transducer and send the depth reading to the dashboard display via the 6-pin connector. There is also a three wire harness (red/blk/wht) that connects to a power supply.

The reason I know all this is my depth finder fried a couple years ago so I removed the Lowrance LSM-1 from the boat in order to find a replacement. Unfortunately, this was an OEM part that is not available from Four Winns or any aftermarket source. Probably your best bet is to look in a boat salvage yard or purchase an aftermarket depth finder.

Hi- I have a 1996 Four winns boat with the same problem. I believe we are missing an adapter cable which goes from the depth cable to the instrument panel. I have not been able to locate this cable yet. If I find it I will let you know and can you do the same for me if you locate one?

Depth: Could be for a number of reasons, too deep for the sounder - check the manual for it's max depth. Dirty water, sounder unable to penetrate through to the bottom. Weed or other debris covering the transducer. Transducer on a swing mount & being pushed out of alignment then dropping back in once stopped.

Speed: Is the speed readout controlled by a GPS or paddlewheel? If it's GPS, check the power connection of the sounder, may be loose which would also cause the depth to 'drop out'. If it's paddlewheel, you're down to bad connections or faulty unit.

Check the finder on the bottom of the boat and make sure the cable is ok?