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Lowrance PRO X51 - page 1
Pub. 988-0151-59A X51 Pro Fish-finding & Depth Sounding Sonar Installation and Operation Instructions ...
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Lowrance PRO X51 - page 2
Copyright © 2008 Navico, Inc. All rights reserved. Lowrance ® is a registered trademark of Navic o, Inc. Marine-Tex ™ is a trad emark of Illinois Tool Wor ks Inc. Lowrance Electr onics may find it n ecessary to change or end our policies, reg ulations, and special offers at any t ime. We res erve the right to do s o without notice. All features ...
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Lowrance PRO X51 - page 3
1 Table of Contents Capabilities and Specif ications: X51 Pro ..................................... 2 Section1: Installation ................................................................ 3 Installation Preparatio ns.............................................................. 3 Transducer Installation ........................................... ...
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Lowrance PRO X51 - page 4
2 Capabilities and Specifications: X51 Pro General Case size: ........................... 5.8" H x 4.3 " W x 2.5" D (1 4.7 cm H x 1 0.8 cm W x 6.6 cm D). Sealed, wat erproof; suitable for saltwater use. Display: ............................ High-contras t Film SuperTwist LCD. Diagonal viewing area: 4.0" (10.2 cm). Resolution: .. ...
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Lowrance PRO X51 - page 5
3 Section 1: Installation Thank you for buying a Lowrance ® sonar! Your unit is a high quality sonar designed for both professi onal and novi ce fishermen. Al l Lowrance sonars have a n automatic mode that finds and displays th e bottom, fish, underwa ter structure an d more – right out of th e box. All you have to do is pr ess the on ( PWR ) ke ...
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Lowrance PRO X51 - page 6
4 installation methods is right for your boat. Us e extreme c are if mounting the transd ucer inside th e hull, becaus e once it is epoxied into position, the transducer usuall y cannot be rem oved. Remember, the transducer installati on is the most critical part of a sonar installation! Your Skimmer transducer typically comes packag ed with a one- ...
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Lowrance PRO X51 - page 7
5 NOTE: Some aluminum boats with strakes or ribs on the outside o f the hull create large amou nts of turbul ence at high s peed. These boats typically h ave large out board motors capable of pro pelling the b oat at speeds faster than 35 mph. Typically, a good tra nsom location on aluminum boats is between the ribs closest to the engin e. 3. The t ...
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Lowrance PRO X51 - page 8
6 How low should you go? For most situations, yo u should install your Ski mmer transducer s o that its centerline is level wit h the bottom of th e boat hull. This will usually give you the b est combination of smooth water flow and protection fr om bangs and bumps. Align transducer centerline with hull bottom. However, there are times when you ma ...
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Lowrance PRO X51 - page 9
7 However, the shoot -thru-hull instal lation does hav e its drawbacks. First, some loss of s e nsitivity d oes occur, ev en on the best hull s. This varies from hull to hull, even from differe nt installat ions on the sam e hull. This is caused by differ ences in hull lay-up an d construction. Second, the transduc er angle cannot be adjusted f or ...
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Lowrance PRO X51 - page 10
8 If the trans ducer's face isn't p arallel with the gr ound, remove th e transducer and ratc hets from the bracket. Plac e the ratchets into t he holes in the bracket with the let ter "B" aligned with the dot stamped in the bracket. Reassemble the transduc er and bracket and place them again st the transom. Again, check to see ...
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Lowrance PRO X51 - page 11
9 Mark the center of eac h slot for the mounting sc rew pilot holes. You will drill on e hole in the c enter of each slot. Drill the holes using the #29 bit (for the #10 screw s). Position transducer m ount on transom and mark m ounting holes. Side view shown at left and seen from above at right. 5. Attaching transducer to transom. Rem o ve the tra ...
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10 Align transducer centerline with hull bottom and attach to transom. 6. Route the transduc er cable through or o ver the transom t o the sonar unit. Make sure to leave some slack in the cable at the tr an sd uce r . If possible, route the transducer cable away from other wiring on the boat. Electrical noise f rom the engine's wiring, bilge p ...
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Lowrance PRO X51 - page 13
11 Attach motor mounting bracket to tra nsducer. 2. Slide the adjustable st rap suppli ed wit h the TMB-S t hrough the sl ot in the transducer b racket and wra p it around t he trolling motor. Position the transduc er to aim straight down when the moto r is in the water. Tighten the strap securely. 3. Route the transducer cable alon g side the tro ...
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Lowrance PRO X51 - page 14
12 Transducer Orientation and Fish Arches If you do not get good fish arches on your disp lay, it could be beca use the transducer is not parallel with the ground when the boat is at rest in the water or at slow troll ing speeds. If the arch slop es up – but not back d o wn – then the front of the transducer is too high an d needs to be lowered ...
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Lowrance PRO X51 - page 15
13 hours, fill the rem aining space with polyester resin. When t he job is finished, the hull is watertigh t and structurally sound. Remember, the sonar signal must pass through solid fiberglass. Any air bubbles in the fiberglass or the e poxy will reduc e or eliminat e the sonar signals. Shoot-thru-hull transducer locatio ns for high speed or trol ...
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14 If you can' t get an accept able bottom signal, try tur ning up th e sensitivity by three or five keystr okes and then move the transducer aro und on ce more. If you find a spot t hat wor ks, ma rk it a nd move on t o step 4. If you have to turn up sensitivity by more than five keystrokes to get a good signal, the transducer should be mount ...
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Lowrance PRO X51 - page 17
15 100 grit sandpaper. The sanded hull ar ea should be about 1-1/2 times the diameter of the transducer. The su rface of the hull m ust be flat so the entire transduc er face is in contact with the hull prior to bonding. After sand ing, clean the hull and transdu cer with rubbin g alcohol to remove any sa nding debris. Epoxy transducer to hull . WA ...
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Lowrance PRO X51 - page 18
16 the transducer shou ld be parallel with the hull, with a mini mum amount of ep oxy betwe en the hull and transduc er. 4. Apply a weight, such as a brick, to hold the transducer in place while the epoxy cures. Be car eful not to bump the tr ansducer while the epoxy is we t. Leave th e weight in place for a m inimum of thre e hours. Allow the epox ...
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Lowrance PRO X51 - page 19
17 Power and transducer connections for the X51 Pro sonar unit (direct battery connection shown). CAUTION: Do not use th is product with out a 3-amp fuse wired int o the power cable! Failure to u se a 3-amp fuse will void your warranty. This unit has reverse polarity prot ec tion. No da mage wi ll occur if the power wires are reversed . However, th ...
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Lowrance PRO X51 - page 20
18 Bracket Installation Mount the unit in any co nvenient locati on, provided th ere is clearance when it’s tilted f or the best viewin g angle. Y ou should also m ake sure there is en ough room behind the unit to attach the p ower/transducer cable. (See the foll owing draw ings, which show the dime nsions of a mounted X 5 1 P r o.) Holes in the ...
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Lowrance PRO X51 - page 21
19 slack for tilting and turning the unit and attach ing the connector. (The snug fit of the push-on waterproof connector requires some force to attach.) Align the br acket over th e cable hole wi th the cabl e slots facing awa y from you and fit the cable through th e slots. Fasten the bracket to the dash using the two screw holes. Attach the unit ...
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Lowrance PRO X51 - page 22
20 Installing the Batte ries Release the latch on the front of the case. Open the case and install eight AA batteries in the battery compartment. After installing the batteries, plug the so nar unit's power cable into the batt ery compartmen t socket. Route th e other end of th e cable through th e opening und er the mounting br acket and clos ...
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Lowrance PRO X51 - page 23
21 Section 2: Operation Keyboard Numbers in the foll owing phot o correspond to the foll owing ke y explanations: X51 Pro 1. PWR/CLEAR This key appears in the manual text simply as PWR . Press this key to t u r n t h e u n i t o n a n d o f f . I t a l s o clears menu selections and the menus from the screen. T o clear a menu from the screen, press ...
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Lowrance PRO X51 - page 24
22 Menus The menu ke ys access thes e features, allowing y ou to custom ize the unit to your p articula r needs a nd wa ter co nditio ns. All you ha ve to do to le ave o ne menu and enter an other is press MENU repeatedl y. If you ever ge t lost in the men us, simp ly press the PWR key. This c lears the menus from th e screen. Menus change dependin ...
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Lowrance PRO X51 - page 25
23 Chart Scroll In normal operation, the sonar chart wi ll scroll from ri ght to left across the screen. Y ou can stop the char t from scrolling across the scr een. This is useful when you w ant to "freeze" the pictur e to study it more closely. To stop the chart, press MENU until the S CROLL S PEED menu appears. Use the DOWN A RROW to se ...
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Lowrance PRO X51 - page 26
24 Depth Range Zoom When turned on, the unit aut omatically adjusts the d epth range acco rdin g to wate r con ditio ns. Whe n in aut o ran ge mode, it always keeps the bot tom displayed in the lower portion of the screen. You can over-ride the automatic depth range control and manually selec t a depth range. To do this, pre ss MENU until the R ANG ...
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Lowrance PRO X51 - page 27
25 When you Zoom while th e unit is in manual depth Range Zoom mode, you can sel ect one of 13 pr e-set Zoom Si zes. This lets yo u enlarge som e other particular se gment of th e water column. Zoom Size menu with the 5-15 foot zoom selected. The boat is in 28 feet of water, but the screen has zoomed in on the water column from 5 to 15 feet below t ...
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Lowrance PRO X51 - page 28
26 To adjust Sensiti vity, press MENU until the S ENSITIVITY A DJUSTMENT menu appears. Press UP A RROW to increase the sensitivity, DOWN A RROW t o d e c r e a s e i t . W h e n i t ' s s e t a t t h e d e s i r e d l e v e l , press PWR to clear the menu. NOTE: If you want to change the sensitivity in Manu al Mode, first turn off Auto Sensiti ...
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Lowrance PRO X51 - page 29
27 Fish I.D . ™ The Fish I.D. feature displays fish symbols in pl ace of the actual fis h echoes. Ther e are three symbo l sizes: small, m edium and large. At left, underwater scene in normal fish arch mode. Right, F i sh I.D. menu with the feature turned on. F i s h I . D . i s a n e a s i e r w a y f o r a s o n a r novice to recognize a fishy ...
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28 To turn it on, press MENU until the F ISH ID menu appears. Press UP ARROW to s e lect T RACK O N , then press PWR . T o t u r n i t o f f , r e p e a t t h e above steps, but press DOWN A R ROW to select O FF . (If you want to turn off FishTrack depths but lea ve Fish I.D. on, press DOWN ARROW to select O N , then press PWR . ) R e m em b e r, F ...
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Lowrance PRO X51 - page 31
29 To turn off the fish alarm without turning off fis h symbols, pr ess MENU DOWN until F ISH A LAR M appears. Press DOWN A RROW to select O FF , then press PWR to clear th e menu. Repeat the above steps to turn the alarm back on, but press UP A RROW to select O N before clearing th e menu. Depth Alarms The depth a l arms are tr iggered on ly by th ...
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Lowrance PRO X51 - page 32
30 Backlight The display i s backlit for nigh t use. To turn the bac klight on or off, press MENU repeatedly until the B A CK L IGHT menu appears. Press UP ARROW to turn the light on or the DOWN ARROW to turn it off. Display Contrast To adjust the contrast, press MENU DOWN until t he D ISPLAY C ONTRAST menu appears. To decrease screen contrast, pre ...
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Lowrance PRO X51 - page 33
31 Simulator This unit has a built-in simula tor t hat shows a simulated bottom signal with fi sh si gnals. This le ts you practic e with the unit as if you were on the wate r; all features and func tions of the un it are usab le. To use the simulator, press MENU DOWN repeat edly until the S IMULATOR menu appears. Press UP A RROW to turn it on, and ...
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Lowrance PRO X51 - page 34
32 Index A Accessories, 18 Alarms, 28 Fish Alarm, 28, 29 Antenna , 35 ASP (Adva nced Signal Processi ng), 13, 28 B Backlights / Lighting, 2, 30 Batteries, 3, 16, 17, 19, 20 , 30, 33, 34, 35 C Contrast , 2, 30 D Depth Alarm s, 29 Depth Range , 3, 13, 14, 24, 25, 34 F Fish Alarm, 28, 29 Fish Depths, 27 FishTrack ™ , 27 Frequency , 2 G Grayline ® , ...
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33 Troubleshooting Unit won't turn on: 1. Check the power cab le's connecti on at the unit. Also ch eck the wiring. 2. Make certain th e power cable is wired proper ly. The red wire connects to the posit ive battery term inal, black to negative or ground. 3. Check the fuse. 4. Measure the batter y voltage at the unit's power connecto ...
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Lowrance PRO X51 - page 36
34 Bottom echo disap pears at hi gh speeds or erratic dig ital reading or weak bottom echo while boat is moving 1. The transducer may be in turbulent water. It must be m ounted in a smooth flow of water for t he sonar to work at all b o at speeds. 2. Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to ...
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35 NAVICO FULL ONE -YEAR WAR RANTY "We," "our," or "us" refers to NAVICO, INC., the manufacturer of th is product. "You" or "your" refers to the first person who purc hases this product as a cons umer item for personal, family or household u se. We warrant this product against defects or malfunction ...
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Lowrance PRO X51 - page 38
36 How to Obtain Service… …in the USA: We back you r investm ent in qualit y products with quick, expert serv ice a n d g e n u i n e L o w r a n c e p a r t s . I f y o u ' r e i n t h e U n i t e d S t a t e s a n d y o u have technical, return or repair questions, please contact the Factor y Customer Servic e Department. Be fore any pro ...
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Lowrance PRO X51 - page 39
Accessory Ordering Information for all countries To order Lowrance accessories such as power c ables or transducers, please contact: 1) Your local m arine dealer or consumer electronics store. Most qualit y dealers that handl e marine el ectronic equipment or other consum er electronics s hould be able to assist you with these items. To locate a Lo ...
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Lowrance PRO X51 - page 40
Visit our web site: Lowrance Pub. 988-01 51-59A © Copy right 2008 All Rights Reserved Printed in USA 04 29 08 Navico ...
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