Install timing belt and spark plugs. Loosen timing belt tensioner screw and remove tensioner spring. Model Covered: Mercury Mariner Outboard Engine 2. As the wax heats up the electrothermal ram needle begins to extend, partially closing the fuel enrichment valve, and reducing the flow of fuel from the float chamber into the venturi. Carefully pry up the valve pad and remove it.
The most important tool in your toolbox may be your Clymer manual -- get one today. The upper electrothermal valve controls fuel flow for carburetors 1 and 2, and the lower valve controls fuel flow for carburetors 3 and 4. Also, the diaphragm functions as a coasting enrichener during quick deceleration, preventing the engine form stalling. Re-check valve clearance using Valve Clearance Measurement Steps. If no adjustment is necessary skip to step 11 on.
The air flows through the in-line, one-way valve, and then to all of the carburetors. Instant download 1990-2000 Mercury Mariner Outboard Motors 2. . Adjust tab if out of specification. It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. Turn the flywheel 360° clockwise.
Install cylinder head cover and driven sprockets. Install tensioner spring and tighten timing belt tensioner. The shop manual will guide mechanics and owners through each service, troubleshooting and repair procedure possible. Remove timing belt and driven sprockets. Clymer Mariner Outboard manuals are written specifically for the do-it-yourself enthusiast. With the outboard in forward gear, adjust idle speed screw to obtain the specified idle speed. Select a proper replacement valve pad by calculating its thickness with the following formula.
The repair manual contains hundreds of original photographs and illustrations obtained from the complete disassembly and assembly of the engine. Remove camshaft caps and camshafts. The throttle lever link rod then pushes the diaphragm in the dashpot, forcing out the air. Re-install driven sprockets and timing belt. Two electrothermal valves are installed on the carburetor assembly.
Covers Bigfoot Big Foot and Non-Bigfoot models. Measure and record the exhaust valve clearance for cylinders 2 and 4. Remove driven sprockets and timing belt. From basic maintenance and troubleshooting to complete overhauls, our Mariner Outboard manuals provide the information you need. After start-up, the current supplied form the electric power source and then flows to the electrothermal valves causing the wax in the valves to heat up.
Install spark plug cover and flywheel cover. Remove flywheel cover and spark plug cover. As the throttle is closed, the throttle lever rotates back and the throttle lever link rod returns, causing the diaphragm in the dashpot to move back, As the diaphragm moves back, suction causes the air from the venturi of carburetor 4 to flow through a one-way valve in the carburetors and back to the dashpot. Loosen timing belt tensioner and remove tensioner spring. This service manual is written for the do-it-yourselfer as well as the experienced mechanic. After a few minutes, the electrothermal ram needle is fully extended, the fuel enrichment valve is fully closed, and enrichment ceases. V-6 Cylinder, Two Cycle, Direct Injected.
As the throttle is opened, the throttle lever rotates and pushes the throttle lever link rod. Loosen timing belt tensioner bolt and remove tensioner spring. Models Covered are Mercury - Mariner 9. Insert the proper valve pad into the valve lifter. Measure and record in the Measurement Table the thickness of the removed valve pad with a micrometer. Disconnect spark plug leads and fuel hoses. If adjustment of intake or exhaust valve clearance is necessary out of specification follow Changing Pad Thickness below.
Keep Your Outboard Running Smoothly. Install tensioner spring and tighten timing belt tensioner bolt. With carburetor turned upside down, and carb scale seated on inner edge, check float level from top of float to float bowl flange as shown. Install driven sprockets and timing belt. Remove timing belt and driven sprockets. This, in addition to extensive research, is how Clymer repair manuals achieve an unmatched level of detail.