Johnson Evinrude Outboard Motor Service Manuals for only $4.95! Johnson Evinrude Outboard Motor Service manuals are available for immediate download! This service is available for only $4.95 per download! If you have a dirty old paper copy of this manual or a PDF copy of this manual on your computer and it crashed we can help! Covers all 60-235 HP, 3-cylinder, V4 and V6, 2-stroke models, includes Jet Drives.
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Fuel Pumps
General Information Fuel Pump Description/Operation Testing Troubleshooting Fuel Pump Fuel Pump Components Fuel Pump Removal/Installation Fuel Pump Cleaning, Inspection, Disassembly and Reassembly Fuel Pump – Cleaning/Inspection Check Valve Reassembly Carburetion Fuel System Troubleshooting Checking for Restricted Fuel Flow Caused by Anti-Siphon Valves Fuel System (Carburetor) Fuel System (Linkage) Carburetor Adjustments Initial Starting Adjustment Low Speed Mixture Adjustment Carburetor Float Adjustment Specification Sheet - WME Carburetors Carburetor Fastener Torques Settings Fuel Pump Specifications Fuel Pump Pressure Sealants Idle Speed Adjustment Main (High Speed) Jet Adjustment Rejetting Carburetors For High Altitude Operation Jet Orifice Size/Part Number Chart Carburetor Removal and Disassembly Carburetor Disassembly Cleaning and Inspection Carburetor Reassembly Idle Air Screw Enrichener System Enrichener Valve Hose Installation Enrichener Valve Test Acceleration Pump Fuel Flow Circuit Fuel Tank Fuel Tank Components Fuel Line and Primer Bulb Assembly Fuel Line Clamp Removal and Installation
Fuel Pumps
General Information FUEL PUMP DESCRIPTION/OPERATION The fuel pump is a crankcase-pressure-operated, diaphragm- type pump. Crankcase pulsating pressure (created by the up-and-down movement of piston) is transferred to fuel pump by way of a passage (hole) between crankcase and fuel pump. When piston is in an upward motion, a vacuum is created in the crankcase, thus pulling in a fuel/air mixture (from carburetor) into crankcase. This vacuum also pulls in on the fuel pump diaphragm, thus the inlet check valve (in fuel pump) is opened and fuel (from fuel tank) is drawn into fuel pump. Downward motion of the piston forces the fuel/air mixture out of the crankcase into the cylinder. This motion also forces out on the fuel pump diaphragm, which, in turn, closes the inlet check valve (to keep fuel from returning to fuel tank) and opens the outlet check valve, thus forcing fuel to the carburetors. CHECKING FOR RESTRICTED FUEL FLOW CAUSED BY ANTI-SIPHON VALVES While anti-siphon valves may be helpful from a safety stand-point, they clog with debris, they may be too small, or they may have too heavy a spring. Summarizing, the pressure drop across these valves can, and often does, create operational problems and/or powerhead damage by restricting fuel to the fuel pump and carburetor(s). Some symptoms of restricted (lean) fuel flow, which could be caused by use of an anti-siphon valve, are: 0001 Loss of fuel pump pressure 0001 Loss of power 0001 High speed surging 0001 Preignition/detonation (piston dome erosion) 0001 Outboard cuts out or hesitates upon acceleration 0001 Outboard runs rough 0001 Outboard quits and cannot be restarted 0001 Outboard will not start 0001 Vapor lock Since any type of anti-siphon device must be located between the outboard fuel inlet and fuel tank outlet, a simple method of checking [if such a device (or bad fuel) is a problem source] is to operate the outboard with a separate fuel supply which is known to be good, such as a remote fuel tank. If, after using a separate fuel supply, it is found that the anti-siphon valve is the cause of the problem, there are 2 solutions to the problem; either (1) remove the anti-siphon valve or (2) replace it with a solenoidoperated fuel shutoff valve. Testing Install clear fuel hose(s) between fuel pump and carburetor( s). Run engine, and inspect fuel passing thru hose(s) for air bubbles. If air bubbles are found, see “Air Bubbles in Fuel Line,” below. If air bubbles are NOT found, see “Lack of Fuel Pump Pressure,” continued on next page. Troubleshooting Fuel Pump PROBLEM: AIR BUBBLES IN FUEL LINE Possible Cause Corrective Action Low fuel in fuel tank. Fill tank with fuel. Loose fuel line connection. Check and tighten all connections. Fuel pump fitting loose. Tighten fitting. A hole or cut in fuel line. Check condition of all fuel lines and replace any found to be bad. Fuel pump anchor screw(s) loose. Tighten all screws evenly and securely. Fuel pump gasket(s) worn out. Rebuild fuel pump. PROBLEM: LACK OF FUEL PUMP PRESSURE Possible Cause Corrective Action An anti-siphon valve. Read “Checking for Restricted Fuel Flow, Caused by Anti-Siphon Valves” preceding. Air in fuel line. “Air Bubbles in Fuel Line”, preceding. A dirty or clogged fuel filter. Clean or replace fuel filter. The fuel pickup in fuel tank clogged or dirty. Clean or replace pickup. Worn out fuel pump diaphragm. Rebuild fuel pump. Defective (hole or crack) check valve(s) in fuel pump (unlikely). Rebuild fuel pump. Broken check valve retainer. Rebuild fuel pump. Pulse hole plugged. Remove fuel pump and clean out hole.
Using this method, that DCR Hc21 had a large zoom angle measure of 42.5 degrees. The results were similar to last year’s hc20, which makes it logical as the camera specs two video exchange sensors. Sony handycam dcr hc21. Sony DCR-HC21 User Manual Pdf –. Then this number was multiplied by 0.2 to get the wide angle points of 8.5.The DCR HC21 adjusts the quality of colors and video in the ideal and bright lighting conditions of 3000 lux in the controlled test environment.
Troubleshooting Fuel Pump
(continued) PROBLEM: LACK OF FUEL PUMP PRESSURE Possible Cause Corrective Action Hole in pulse hose (1 pulse hose). Replace pulse hose. Loose pulse hose. Tighten connection. Boost diaphragm gasket distorted or out of place. Check seal between mating surfaces where “rib” divides pulse chamber – gasket must align with rib; check for distorted gasket. Align or replace gasket if necessary. Fuel Pump Components (Design 1) NOTE: In fuel pump reassembly, remember that respective diaphragms go against the mating surfaces of the fuel pump body, and respective gaskets are between the diaphragms and end caps. Gaskets should always be replaced on fuel pump assembly.
a - Fuel Pump Base
b - Fuel Pump Body c - Chamber Plate d - Gasket, Base e - Fuel Filter – Inline f - Gasket, Pulse Chamber g - Diaphragm, Fuel Pump h - Retainer, Check Valve i - Check Valve j - Check Valve Rubber Disc k - Main Compression Spring End Cap l - Main Compression Spring m- Boost Diaphragm n - Boost Chamber Gasket o - Boost Compression Spring End Cap p - Boost Compression Spring q - Retainer, Check Valve r - Check Valve s - Check Valve Rubber Disc t - Check Valve Assembly
Carburetion Download a 25HP outboard repair manual in seconds. An outboard marine engine repair manual is a book of instructions, or handbook, for learning how to maintain, service and overhaul the 25 HP outboard motor to factory specifications.Fuel System Troubleshooting Troubles, that are caused by items 1-thru-5, listed below, may give the impression that a problem exists in the fuel system: 1. Spark plugs 2. Ignition spark voltage 3. Cylinder compression 4. Reed valves 5. Ignition timing Troubleshooting Charts Popular List of 25HP Service Manual Phrases 02 yamaha 25hp motor bracket removal 08 25hp suzuki owners manual 1970johnson 25hp outboard manual free download uk 1974 johnson 25hp tune up specs1975 25hp johnson outboard model 25r75b service manual download 1979 johnson25hp service 1973 yamaha 25hp parts list 1982 25hp compression test 1971 mercuy25hp replace throttle cable 1984 25hp yamaha carb schematic 1972 25hp mercuryoutboard starter solenoid. Evinrude Service Manuals FreeTrouble shooting 1976 yamaha 25hp repair manual 1977 25hp johnson outboard manual free down load 1979 25hp mercury shift problems1978 evinrude 25hp free manual 1980 25hp johnson free manual 1981 25hp mercurywater pump 1984 25hp ignition system mercury outboard manual 1982 25hp evinrudeidle adjustment found 1985 25hp suzuki disemble remote flexi cables 1983 25hpmariner owners and maintenance manual 1986 mariner 25hp outboard serial numberlocation 1987 25hp yamaha serial number 1988 mercury 25hp changing water pump1989 25hp evinrude 1990 25hp evinrude manual.Evinrude Manuals Free Download1991 25hp mercury 4 stroke camtiming instructions 1992 25hp yamaha 4 stroke choke not working 1993 mercury25hp enrichment aortic valve replacement 1994 mercury 25hp enrichment valvereplacement 1995 suzuki 25hp 4 stroke weight 1996 25hp mercury lower unit disassembly 1997 25hp suzuki dt 4 storke outboard motor will not shift in toforward into reverse 1998 yamaha 25hp carb rebuild 1999 johnson 25hp map sensor2000 25hp mariner oil drain 2001 mercury 25hp 4 stroke prop shaft replacement2002 mercury 25hp outboard efi how to check the oil level 2006 suzuki 25hpoutboard engine diagram 2003 yamaha 25hp 2troke air fuel screw settings 2005yamaha 25hp replacing dog gear 2004 25hp yamaha workshop manual.2006 suzuki25hp outboard repair manual download 2007 25hp suzuki 25hp evinrude model25702h instruction manual 25hp 2008 evinrude wont crank 25hp johnson 2 stroke ownersmanual 25hp johnson will not idel 25hp johnson won t idle 25hp mariner outboardservice manual 25hp mercury 4 cylinder outboard timming setting 25hp mercurychoke 25hp mercury link and synch carbs 25hp mercury outboard carburatoradjustment 25hp mercury outboard idles but stops when speeding up 25hp mercuryoutboard motor workshop manual 25hp 2009 mercury outboard starter repairs 25hpmercury outboard trouble shooting manual 25hp 2010 mercury outboard tuneup procedure. 25hp 2011 mercury tracker outboard service manual 25hp omc idle adjustment 25hpsuzuki service manual 25hp 2012 suzuki service repair manual for water pump 25hpyamaha twin carb fuel pump schematic 99 evinrude 25hp outboard motor manualadjust timing on 25hp yamaha outboard adjusting hi low on 1985 25hp mercuryoutboard b adjustment for a 2013 yamaha 25hp four stroke carb adjustment 1989mercury 25hp outboard changing impeller on 25hp yamaha check unit adaptor for2014 mercury putboard 25hp choke on 25hp mercury cleaning carburetor. Evinrude Outboard Motor Manuals Pdf2003yamaha 25hp outboard elshema mercury 25hp 1988 engine oil drain on a 2003mercury 25hp outboard evinrude 25hp 4 stroke troubleshoting evinrude 25hpoutboard 4 stroke manual transmission evinrude 25hp outboard will not startwhen cold evinrude 25hp owners manual by serial number float adjustment for1977 johnson 25hp free 2009 25hp e tec evinrude service manual free 25hp suzukioutboard service manual free download manual for 2002 25hp big foot outboardmotors free download works manule 25hp maraner outboard free downloadableservice manual for 1974 25hp evinrude.Free mariner 25hp 2002 repair manual freeservice manual 1972 25hp e vinrude head tension for 25hp johnson two stroke howdo i pull driveshaft out of lower unit housing 2000 mercury 25hp outboard motorhow do you remove starter from 25hp bigfoot mercury how to adjust 1996 25hpevirude carb for rough idle how to adjust the carb on 2004 yamaha 25hp 2 strokehow to adjust valves on df 25hp suzuki how to disconnect shifer shaft on 25hpsuzuki outboard how to install 25hp evinrude gearcase extension kit. Comments are closed.
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