CP370/B164 issue

[Chuck - Raymarine - Moderator]

Eric,

Your photos indicate bottom loss at planing speeds, but no indication of performance while operating at trolling speeds. Please click here to view a FAQ addressing loss of bottom at planing speeds. Essentially, should the problem not occur when stationary, drifting, or operating at trolling speeds, then the problem would not be associated with the sounder module or transducer. This issue may also result electronic noise from the engine. The latter may be verified by observing the engine RPMs when the problem is observed, halting the vessel, and then with the engines in neutral, raising the engine RPMs to the same level at which bottom loss had occurred. Should the problem not be related to engine noise and manifest itself when stationary, drifting, or operating at trolling speeds, then it would be recommended that the CP370 be sent to Raymarine’s Product Repair Center to be bench checked / serviced.