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© 2008 Mercury Marine

25 Jet 2-Stroke Supplement

90-10257081 507

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Содержание Jet 25

Страница 1: ...i 2008 Mercury Marine 25 Jet 2 Stroke Supplement 90 10257081 507...

Страница 2: ...ii...

Страница 3: ...g In Freezing Temperatures 11 Pre Starting Check List 11 Operating In Salt Water Or Polluted Water 12 Operating In Shallow Water 12 How the Jet Drive Operates 13 Stopping the Boat in an Emergency 14 S...

Страница 4: ...TABLE OF CONTENTS iv TROUBLESHOOTING Engine Over Speed Excessive RPM 24 Performance Loss 24 ENGINE INSTALLATION Determining the Mounting Height of the Outboard 25 Water Testing 26...

Страница 5: ...is only occasionally used for such purposes The repair or replacement of parts or the performance of service under this warranty does not extend the life of this warranty beyond its original expirati...

Страница 6: ...ty service Warranty claims shall be made by delivering the product for inspection to a Mercury dealer authorized to service the product If purchaser cannot deliver the product to such a dealer written...

Страница 7: ...g system by a foreign body running the engine out of water mounting the engine too high on the transom or running the boat with the engine trimmed out too far Use of the product for racing or other co...

Страница 8: ...IMITED IN DURATION TO THE LIFE OF THE EXPRESS WARRANTY INCIDENTAL AND CONSEQUENTIAL DAMAGES ARE EXCLUDED FROM COVERAGE UNDER THIS WARRANTY SOME STATES COUNTRIES DO NOT ALLOW FOR THE DISCLAIMERS LIMITA...

Страница 9: ...nd reverse thrust will minimize boat movement the boat may tend to move slowly forward or backward This is normal for a direct drive jet driven boat The operator should be aware of this and use cautio...

Страница 10: ...in the understanding of a particular step or action Protecting People In The Water WHILE YOU ARE CRUISING It is very difficult for a person standing or floating in the water to take quick action to av...

Страница 11: ...wing suggestions Use flotation devices Have an approved personal flotation device of suitable size for each person aboard it is the law and have it readily accessible Do not overload your boat Most bo...

Страница 12: ...as sand shells seaweed grass tree branches etc can be pulled in by the pump This may not only block the water flow and cause lost of steering control but can be expelled from the rear of the pump as...

Страница 13: ...cement Specifications Model Jet 25 Jet power 19 kW 25 hp Horsepower 22 kW 30 hp Engine idle RPM 950 25 RPM Full Throttle RPM range 5150 5850 RPM Number of cylinders 2 Piston displacement 429 cc 26 3 c...

Страница 14: ...29515 a Top cowl b Manual start handle c Throttle grip d Gear shift e Lanyard cord f Reverse lock lever g Tilt pin h Jet drive housing i Water intake housing j Reverse gate k Water outlet l Driveshaft...

Страница 15: ...e is clear Pre Starting Check List Operator knows safe navigation boating and operating procedures An approved personal flotation device of suitable size for each person aboard and readily accessible...

Страница 16: ...ter intake can be greatly increased by avoiding the intake of sand and gravel The intake suction will act like a dredge when the water intake comes close to the bottom It is better to stop the engine...

Страница 17: ...moves over the outlet nozzle to direct the water in the opposite direction a c b 29022 a Water intake b Water outlet nozzle c Reverse gate When the jet drive is in neutral the impeller continues to ro...

Страница 18: ...stopping capability unique to this form of propulsion WARNING Using the emergency stopping capability of a jet drive unit will slow down the boat in an emergency However sudden stopping may cause the...

Страница 19: ...ch or plugging the water intake to the jet pump Use caution when maneuvering at high speeds in areas where debris weeds logs gravel etc could be picked up into the jet drive The ability to take evasiv...

Страница 20: ...e the engine must be shut off and debris physically removed from the grate Clearing A Lodged Impeller WARNING Rotating the flywheel to free a lodged impeller can accidentally start the engine resultin...

Страница 21: ...arpen or alter the top side lifting angle Check the impeller blades occasionally for damage Use a flat file to resharpen the leading edges Sharpen to a 0 8 mm 1 32 in radius by removing material from...

Страница 22: ...Check the impeller clearance by sliding a feeler gauge through the intake grate and measure the clearance between the impeller edge and liner If adjustment is required refer to Impeller Removal and In...

Страница 23: ...peller always turn the ignition key or lanyard stop switch to the OFF position and remove the spark plug leads from the spark plugs while servicing the impeller 1 Shift the outboard to the neutral pos...

Страница 24: ...se on the shaft until the keyway is directly above the flat on the shaft This will free the jammed key and allow removal Shift Link Rod Adjustment WARNING Pressurized water hitting the reverse gate ma...

Страница 25: ...tral Pull on the reverse gate by hand to verify a b c d 29084 a Shift link rod b Shift cam c Roller d Reverse gate ADJUSTING SHIFT LINK ROD 1 Place the shift handle into full forward shift position 2...

Страница 26: ...e Driveshaft Bearing Lubricate the driveshaft bearing before each use Tube Ref No Description Where Used Part No 95 2 4 C with Teflon Driveshaft bearing 92 802859A 1 IMPORTANT It is important not to u...

Страница 27: ...re Visually inspecting the purged grease at this time will give an indication of conditions inside the bearing housing A gradual increase in moisture content indicates seal wear If the grease begins t...

Страница 28: ...ent Tilting the outboard out beyond a vertical position Cavitation of the impeller due to rough water or obstruction in the boat hull Blockage of the water intake Performance Loss POSSIBLE CAUSES Thro...

Страница 29: ...ondition should be avoided by proper height setting Installing the outboard too low on the transom will allow excessive drag BOATS WITH A V BOTTOM HULL 1 Measure the width of the leading edge on the w...

Страница 30: ...revent cavitation at running speeds When operating the boat the outboard driveshaft housing should be vertical or tilted toward the boat when planing to provide a scooping angle on the water intake Ti...

Страница 31: ...a rough water plate A rough water plate may be helpful in reducing cavitation when running in windy rough water conditions where air is sucked into the water intake when jumping waves Install a 0 8 m...

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