Measure and record the exhaust valve clearance for cylinders 2 and 4. Remove driven sprockets and timing belt. The bore for this outboard is 2. Install spark plug cover and flywheel cover. Measure and record the exhaust valve clearance for cylinders 1 and 3. Loosen timing belt tensioner and remove tensioner spring.
And thus Mercury Outboards were born by Kiekhaefer and his 25 employees working 18 hours per day, 7 days a week. 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. Tighten timing belt tensioner and install tensioner spring. Models Covered are Mercury - Mariner 9. Because this information has come from many sources we can not guarantee its accuracy. Re-check valve clearance using Valve Clearance Measurement Steps.
Check fuel tank for sufficient fuel and Check water pump operation as outlined in that tank is secure in boat. This is a 2 cylinder model. Individuals using this Mariner outboard marine repair manual should possess basic knowledge of tools and mechanical theory. Allow rope to rewind slowly. Re-install driven sprockets and timing belt. Simply enter the original model or serial number assigned to your outboard motor by Mercury Marine. Before start-up, the electrothermal ram needle is retracted the fuel enrichment valve is opened according to the temperature, allowing a high percentage of fuel to flow form the flat chamber into the venturi during start-up.
This engine has power steering and a electric-type starter. Information on this page is provided to you as a free service of iboats. Locks motor i n a fully tilted position. If adjustment of intake or exhaust valve clearance is necessary out of specification follow Changing Pad Thickness below. Insert the proper valve pad into the valve lifter. Remove flywheel cover and spark plug cover. Measure and record in the Measurement Table the thickness of the removed valve pad with a micrometer.
Open air vent on fuel tank cap. Install tensioner spring and tighten timing belt tensioner. Thus, for safety and other reasons, it is a good idea to verify information here to make sure it matches up with your boat. Adjust tab if out of specification. Thus, for safety and other reasons, it is a good idea to verify information here to make sure it matches up with your boat.
The iboats are another excellent source of information. Carefully pry up the valve pad and remove it. Be sure to do your testing under your normal boating conditions and with a good propeller not bent, cracked, or excessively chipped. This engine has power steering and a electric-type starter. Turn the flywheel 360° clockwise. Covers Bigfoot Big Foot and Non-Bigfoot models. The iboats are another excellent source of information.
As part of the purchase Kiekhaefer inherited 384 Thor Outboard Motors after they were rejected from a 500 unit order by Montgomery Ward because they simply didn't work. 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. . If badly tervals, to help maintain its top operating nicked, bent or cracked, refer t o Author- performance, and correct potential prob- ized Service Facilities. The in-line, one-way valve prevents the air in the hoses from flowing back to the dashpot.
The company was the failing manufacturer of the Thor Outboard Motor. Loosen timing belt tensioner screw and remove tensioner spring. Align timing marks on driven cams. Keep individual cylinder parts together. The upper electrothermal valve controls fuel flow for carburetors 1 and 2, and the lower valve controls fuel flow for carburetors 3 and 4. Even if this information is the same as the original factory specs, boats are sometimes modified.
Although being labeled the father of Mercury Outboards, its interesting that Kiekhaefer actually worked as a draftsman for Evinrude outboard motors in 1927 however was fired after just 3 months employment with Evinrude. This was no small feat realizing Evinrude was only producing slightly more than this volume at the time. Install driven sprockets and timing belt. Even if this information is the same as the original factory specs, boats are sometimes modified. Connect fuel hoses and spark plug leads. Its recommended to only use the exact tools, as specified in the factory Mariner outboard manual.