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The following are registered trademarks of
Brunswick Corporation: Merc, MerCathode,
MerCruiser, Mercury, Mercury Marine,
Quicksilver, and Ride-Guide.
INSTALLATION MANUAL D7.3L D-TRONIC
DIESEL ENGINES - BRAVO MODELS
NOTICE to INSTALLER
After Completing Installation, These Instructions Should Be Placed with the Product for the Owner’s
Future Use.
NOTICE to COMMISSIONING DEALER
Predelivery Preparation Instructions Must be Performed Before Delivering Boat To The Product
Owner.
Table of Contents
Gene
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS General Information Notice to Installer Throughout this publication, “Warnings” and “Cautions” (accompanied by the International ! Hazard Symbol ) are used to alert the installer to special instructions concerning a partic- ular service or operation that may be hazardous if performed incorrectly or carelessly. –– Observe Them Carefully! These “Safety Alerts,” alone, cannot eliminate the hazards that they signal. Strict com- pliance to these special i
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS WARNING Electrical system components on this engine are not external ignition protected. DO NOT STORE OR UTILIZE GASOLINE ON BOATS EQUIPPED WITH THESE EN- GINES, UNLESS PROVISIONS HAVE BEEN MADE TO EXCLUDE GASOLINE VA- PORS FROM ENGINE COMPARTMENT (REF: 33 CFR). Failure to comply could re- sult in fire, explosion and/or severe personal injury. Notice on Bravo Trim-In Limit NOTE: Bravo One, Two and Three Models are equipped with a Trim-In Limit Pin Ins
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Multiple Sterndrive Steering Tie Bar Arrangements With multiple sterndrives it is important to consider which of several possible steering sys- tems should be selected. CAUTION Failure to observe the recommended Tie Bar Arrangements as presented in this section could result in serious damage to the steering and/or trim system compo- nents. This damage could adversely affect control of the boat. INTERNAL TIE BAR ONLY At the lower end of the performance
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Quicksilver Products ACCESSORIES Quicksilver remote controls, steering systems, propellers, etc. are available for this product. Refer to “Quicksilver Accessories Guide” for complete listing. This “Guide” is available from: Attn: Parts Department Mercury Marine W6250 W. Pioneer Road P.O. Box 1939 Fond du Lac, WI 54936-1939 OR – Outside of U.S.A., order through Distribution Center, or Distributor. INSTALLATION PRODUCTS DESCRIPTION PART NUMBER Quicksilv
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Torque Specifications TORQUE DESCRIPTION DESCRIPTION lb-in. lb-ft Nm Speedometer Pickup Barb Fitting 10-15 1.2-1.6 Exhaust Pipe or Block-off Plate 20-25 27-34 Power Steering Hydraulic Hose Fittings 20-25 27-34 Power Trim Pump Hose Fittings 100-150 11-16 1 Propeller Nut (Bravo One and Two) 55 75 Front 100 136 1 1 Pro Prope peller ller N Nuts uts (B (Bravo ravo Th Three) ree) Rear 60 81 Rear Engine Mounts 35-40 47-54 Steering Cable Coupler Nut 35 47 Ste
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Antifouling Paint IMPORTANT: Corrosion damage that results from the improper application of anti- fouling paint will not be covered by the limited warranty. Painting Boat Hull or Boat Transom: Antifouling paint may be applied to boat hull and boat transom but you must observe the following precautions: IMPORTANT: DO NOT paint anodes or MerCathode System reference electrode and anode, as this will render them ineffective as galvanic corrosion inhibitor
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Installation Requirements Boat Construction TRANSOM a f e e c 22033 b d 22170 a- Transom Thickness - 2 in. (51mm) Minimum to 2-1/4 in.(57mm) Maximum b- Inner Surface of Transom Must Be Parallel Within 1/8 in. (3mm) in Area Covered by Transom Plate (e) and Remain Within Transom Thickness Limits. c- Outer Surface of Transom Must Be Parallel Within 1/16 in. (2 mm) in Area Covered by Transom Plate (e) and Remain Within Transom Thickness Limits. d- Remove
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS ENGINE COMPARTMENT WARNING Boating standards (NMMA, ABYC, etc.) and Coast Guard regulations must be ad- hered to when constructing the engine compartment. Care must be exercised in the design and construction of the engine compartment. Seams must be located so that any rain water, which may leak through the seams, is directed away from the air intake system. Water, that runs onto the air intake, may enter the engine and cause serious damage to interna
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Multiplying the engine air flow (cfm) by 0.1 will generally determine the combustion air vent size requirement (per engine). Therefore: Engine Combustion Combustion Air Vent Area Per Engine = Air Flow (cfm) X 0.1 (Square Inches) OR 3 Engine Combustion Air Flow (m /min.) X Combustion Air Vent Area Per Engine = 22.8 (Square Centimeters) 1 D7.3 D-Tronic Example: 1000 X 0.1 = 100 Square Inches 1 OR 28.2 X 22.8 = 642.9 Sq. Cm. 1 : For engine combustion
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Exhaust System IMPORTANT: It is the responsibility of the boat manufacturer or installing dealer to properly locate the engine and install the exhaust system. Improper installation may allow water to enter the exhaust manifolds and combustion chambers and severely damage the engine. Damage caused by water in the engine will not be covered by MerCruiser Warranty, unless this damage is the result of defective part(s). Determine if an exhaust riser kit o
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Some engines may be equipped with a factory installed exhaust riser. Verify that the riser provides the required dimension “c”, or a distance greater than “c”, as indicated. Model (c) = (a) Minus (b) All Models (c) Must Be 13 in. (330 mm) or More b d a c merCruiser 76076 Typical Engine With Riser a- From Waterline to Top of Transom b- From Highest Point on Exhaust Riser to Top of Transom c- Equals (a) minus (b) d- Waterline At Rest Fuel Delivery Syste
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS 4. The tank breather pipe must have an inner diameter of at least 1/2 in. (13mm) and must be fitted with a swan neck to prevent water from entering the tank. It is recommended that the exact route and length of the fuel lines be established at the first installation of the engine to prevent problems later in connecting them to the engine. All fuel lines must be well secured. The holes where the lines run through the bulkheads should be carefully round
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Battery IMPORTANT: Boating industry standards (BIA, ABYC, etc.) federal standards and Coast Guard regulations must be adhered to when installing battery. Be sure battery cable installation meets the pull test requirements and that positive battery terminal is properly insulated in accordance with regulations. IMPORTANT: It is recommended (required in some states) that battery be installed in an enclosed case. Refer to regulations for your area. IMPORT
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS EDI Electrical System Precautions NOTE: The following precautions apply to all EDI model Engines. CAUTION Avoid damage to the Electronic Direct Injection (EDI) electrical system and compo- nents. Refer to the following precautions when working on or around the EDI electri- cal harness or when adding other electrical accessories: • DO NOT tap accessories into engine harness. • DO NOT puncture wires for testing (Probing). • DO NOT reverse battery leads.
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS c b a 76010 D7.3L D-Tronic Shown - All Similar a- Engine Harness Connector b- Extension Harness Connector (From Instruments) c- Electrical Bracket TACHOMETER SPECIAL INFORMATION IMPORTANT: If using a tachometer from another manufacturer, do not use the mag- netic tachometer pickup (or related wiring) mounted on the flywheel housing. If using the Quicksilver Tachometer provided with the engine package, the appropriate set- ting of the switch located on
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Propeller Selection GENERAL INFORMATION IMPORTANT: Installed propeller must allow engine to run at its specified maximum wide-open-throttle revolutions per minute (rpm). Use an accurate service tachometer to verify engine operating rpm. It is the responsibility of the boat manufacturer and/or the selling dealer to equip the power package with the correct propeller(s). Specified engine wide-open-throttle (WOT) and oper- ating rpm range are listed in th
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS Hot Water Heater Installation Recommendation IMPORTANT: When connecting a cabin heater or hot water heater, certain require- ments must be met, including, but not limited to the following: • Supply hose (from engine to heater) and return hose (from heater to engine) MUST NOT EXCEED 5/8 in. (16 mm) I.D. (inside diameter). • Make heater connections ONLY at locations indicated in the following informa- tion. • Refer to manufacturers’ instructions for com
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS RETURN HOSE CONNECTION a 76023 a- Location on Water Circulation Pump for Hot Water Return (Bayonet Fitting Replaces Plug) Seawater Connections D7.3L D-Tronic and D7.3L D-Tronic LD models must be equipped with a through hull or through transom water supply to ensure sufficient water flow to the engine. The transom assembly needs to be modified with the water passage block-off plate kit (P/N 818304A1) provided. It is necessary to cut the water hose that
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D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS SEAWATER STRAINER Strainer used must be of sufficient size to ensure that an adequate supply of water will be maintained for cooling the engine. 1 Seawater Strainer Minimum Flow Rate All Models 40 (150) 1 Amount listed is in gallons per minute and (liters per minute). Install seawater strainer in an area where it will be easily accessible for inspection and cleaning. Strainer should be installed in water inlet hose after the seacock (water inlet val
