1987 40 hp mariner outboard

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1987 40 hp mariner outboard

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1987 40 hp mariner outboard

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Mercury Mariner Outboard Motor Model Year Lookup Guide

Canada Only. North America. Show only see all Show only. Free Returns. Free shipping. Completed listings. Sold listings. More refinements Additional navigation. Amounts shown in italicized text are for items listed in currency other than Canadian dollars and are approximate conversions to Canadian dollars based upon Bloomberg's conversion rates. For more recent exchange rates, please use the Universal Currency Converter.This is a 2 cylinder model.

The displacement for the pistons is The bore for this outboard is 2.

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This engine has power steering and a electric-type starter. For example, if you look at your tachometer at top speed and it is not within the engine's RPM range then that is generally not good. Be sure to do your testing under your normal boating conditions and with a good propeller not bent, cracked, or excessively chipped. Information on this page is provided to you as a free service of iboats.

Because this information has come from many sources we can not guarantee its accuracy. Even if this information is the same as the original factory specs, boats are sometimes modified. 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 Outboard Motor Forums are another excellent source of information. The iboats Forum Directory can likely help you find a lot of outboard information as it is arranged by subject. Engine Manual: Mariner Outboard Manual Information on this page has come from multiple third parties and can not be guaranteed to be accurate. All rights reserved. This 40 horsepower Mariner by Mercury Marine outboard, manufactured inis a saltwater model. Mariner Outboard Manual. Information on this page has come from multiple third parties and can not be guaranteed to be accurate.The parameters for adjusting the carburetor on a Mercury outboard involve both the idle speed screw that controls the motor's speed at idle, and the mixture screw that controls the fuel-to-air ratio.

Adjusting both of these requires that you have the motor running. While the adjustments seem minor, both affect the performance and economy of your motor.

Mercury Mariner Outboard Motor Model Year Lookup Guide

Move the motor's shifter into "Neutral. Turn the idle speed screw until the throttle plate positioner does not touch the idle speed screw. The throttle plate will close. Loosen the jam nuts, located right below the throttle cam on the throttle cable.

Move the the throttle to the idle position. Set the cam follower roller against the throttle cam.

Mariner 40 HP

Tighten the jam nuts on the throttle cable and tighten the cam follower screw. Turn the idle speed screw clockwise -- to the right -- until there is a gap of between 0. Attach a flushing attachment to a garden hose. Set the flushing attachment over the raw water intake ports of the motor and turn the hose on full force. Start the motor and warm it to its normal operating temperature range. Attach a shop tachometer to the motor's Number 1 cylinder. Turn the idle speed screw on the carburetor linkage to adjust the motor's speed to between and rpm.

Put the motor in "Forward. Turn the screw counterclockwise one-quarter turn or until the motor no longer misfires. With the motor in gear, "punch" the throttle for sudden acceleration and readjust the mixture screw if it "bogs down" before accelerating. Recheck and readjust the idle to between and rpm.

Will Charpentier is a writer who specializes in boating and maritime subjects.

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A retired ship captain, Charpentier holds a doctorate in applied ocean science and engineering. He is also a certified marine technician and the author of a popular text on writing local history. About the Author. Photo Credits.Download Manuals Below.

V6 Cylinder, Two Cycle. Models Covered are Mercury - Mariner 9. Starting Serial Number 0T This carburetor assembly uses the PrimeStart system for precise fuel delivery during start-up, at all temperatures. Two electrothermal valves are installed on the carburetor assembly.

The upper electrothermal valve controls fuel flow for carburetors 1 and 2, and the lower valve controls fuel flow for carburetors 3 and 4. 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. 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.

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. After a few minutes, the electrothermal ram needle is fully extended, the fuel enrichment valve is fully closed, and enrichment ceases.

This carburetor assembly uses an accelerator pump to ensure that the proper amount of fuel reaches all of the carburetors during rapid throttle openings preventing temporary lean conditions. As the throttle is opened, the throttle lever rotates and pushes the throttle lever link rod.

The throttle lever link rod then pushes the diaphragm in the dashpot, forcing out the air. The air flows through the in-line, one-way valve, and then to all of the carburetors. This additional air flows into the carburetors and mixes with the fuel from the main jets.

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. The in-line, one-way valve prevents the air in the hoses from flowing back to the dashpot. Also, the diaphragm functions as a coasting enrichener during quick deceleration, preventing the engine form stalling.

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.

Adjust tab if out of specification. NOTE: Measure float level without gasket. NOTE: Bend tab to adjust float height. NOTE: Outboard should be completely warmed up for the idle speed adjustment. With the outboard in forward gear, adjust idle speed screw to obtain the specified idle speed. NOTE: Valve clearance adjustment should be made on a cold engine at room temperature.

Remove flywheel cover and spark plug cover. Disconnect spark plug leads and fuel hoses. Loosen timing belt tensioner bolt and remove tensioner spring. Remove timing belt and driven sprockets.

Remove cylinder head cover and spark plugs. Install tensioner spring and tighten timing belt tensioner. Measure intake and exhaust valve clearance using the Valve Clearance Measurement Steps below.

Measure and record the intake valve clearance for cylinders 1 and 2. Measure and record the exhaust valve clearance for cylinders 1 and 3. Measure and record the intake valve clearance for cylinders 3 and 4. Measure and record the exhaust valve clearance for cylinders 2 and 4. If adjustment of intake or exhaust valve clearance is necessary out of specification follow Changing Pad Thickness below. If no adjustment is necessary skip to step 11 on.

Align timing marks on driven cams.JavaScript seems to be disabled in your browser. You must have JavaScript enabled in your browser to utilize the functionality of this website. Cheap Mercury outboard Parts Galore! You have found the home of the most Fresh water used mercury outboard parts for sale in one place! Older Mercury outboard parts are not obsolete mercury outboard parts at Green Bay Prop. Whether you want Mercury outboard parts used or new we have got you covered. View as: Grid List.

Propeller SALE!! Prop Finder by Model. Prop Hub Kits. Props for Honda 4. Bravo II Props. Bravo III Props. Props For Mercury Hp 8 Tooth Props for Suzuki 9. Volvo Dual Props. Aquamatic Long Hub.

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1987 40 hp mariner outboard

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1987 40 hp mariner outboard

Parts for Mariner outboard motors are getting hard to find. Especially the older Mariner motor parts. If you are looking to get you mariner spare parts you will probably have to find used Mariner Outboard Parts. View as: Grid List. Propeller SALE!! Prop Finder by Model. Prop Hub Kits. Props for Honda 4. Bravo II Props. Bravo III Props. Props For Mercury Hp 8 Tooth Props for Suzuki 9. Volvo Dual Props. Aquamatic Long Hub. Props for Yamaha 2.

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