Johnson Vro 40 Hp Manual
Hello All, I have a 1988 Johnson 40 HP VRO; the VRO system has been disabled. I ran the boat this past weekend. Started up great but I accidently left the ventilation on the tank closed. Ran for about 30 minutes then stalled.
Here is a FREE manual for a Johnson or Evinrude outboard motor. If you have a Johnson or Evinrude outboard this is the repair manual.
Once I realized the issue I opened the valve now the engine will not start and stay idle. The boat will turn over and idle for about 30 second then stall out right again. Any help would be appreciated. Edit: Lower unit was replaced last year and carbs were cleaned recently. Also I replaced the spark plugs this past weekend. It could have cause some crud to be sucked into the carb jets.Thanks for all the replies. What would be the quickest way to clean it?
Do I need to take apart the carb to clean the jets? I actually tried pumping the ball trick today and it got the motor to start. Funny thing is the motor actually started idles for about 15 - 20 minutes.
So I decided to take it out. Now the engine won't get up to full throttle. Eventually stalled out after 40 minutes; tried getting up to full throttle a few times which made it stall out. Re: 1988 Johnson 40 HP VRO Thanks for all the helpful replies. I still think I need to clean the carbs but what has been happening seems a little weird. I replaced the fuel line from the engine to the tank this week.
Engine starts up great on land. Once I place in the water it starts right up but once I get it going it stalls right out then won't restart until I get it back home. Then once I am home it starts right up again. So it seems once the propellor has any resistance the engine stalls.
Still a carb issue or something else? I searched around the forum and saw other people had this issue but it was related to a bad cylinder. When I pull off the plug in one cylinder it loses power and same deal with the other cylinder.
So I am unsure of where to go from here? Pontiac Wave Repair Manual here. !
The Johnson-Evinrude Workshop manual downloads for the above listed models describes the service procedures for the complete vehicle. Follow the Maintenance Schedule recommendations to ensure that the outboard is in peak operating condition. Performing the scheduled maintenance is very important. It compensates for the initial wear that occurs during the life of the outboard motor. All chapters in the Workshop Manual apply to the whole vehicle and illustrates procedures for removal/installation of components that are in detailed step-by-step fashion. Most all Workshop manual chapters start with an assembly or system illustration, diagrams, exploded parts view, pictures, service information and troubleshooting for the section.
The subsequent pages give detailed procedures. PROBLEM 1: ENGINE TURNS OVER BUT WILL NOT START OR STARTS HARD WHEN COLD Possible Cause Corrective Action Improper starting procedure. Check procedure, as outlined in “Operation and Maintenance Manual.” Fuel tank empty; improperly mixed fuel; contaminants (water, dirt, etc.) in fuel. Check fuel in fuel tank and replace or add. Fuel tank air vent closed or restricted. Air vent must be open and free from contaminants.
A pinched or restricted fuel line. Check, and replace as needed. Dirty or restricted fuel filter. Check, replace or clean. Enrichener valve not operating. Check enrichener system. (Refer to “Enrichener System” following.) An inlet needle (in carburetor) that is stuck open or closed.
(A needle stuck open, will cause a flooding condition. A needle stuck closed, will prevent fuel from entering carburetor. 2017 Gmc Sierra Duramax Diesel Repair Manual. ) Remove, clean, or replace. Anti-Siphon valve restricting fuel flow.
Refer to “Checking for Restricted Fuel Flow caused by Anti-Siphon Valves”, following. See “Checking for Restricted Fuel Flow caused by Anti-Siphon Valves”, page 3A-1. PROBLEM: ENGINE FLOODS Possible Cause Corrective Action Dirt or foreign particles are preventing inlet needle from seating. Flush out inlet seat and clean inlet needle. Worn inlet needle. Punctured float.
Incorrect float setting. PROBLEM: ENGINE RUNS TOO LEAN Possible Cause Corrective Action Carburetor is loose. Air leaks past mixing chamber cover. Tighten bolts securely. Tighten cover or replace gasket. Fuel level too low. Reset float level.
Clogged high speed jet. Check and clean. Restricted fuel flow to carburetor. Check fuel lines and filter(s) for restricted flow. Incorrect high speed jet. Refer to main jet chart and replace with proper jet. Idle mixture set too lean.
Adjust to run richener. Air leakage into fuel system.
Check fuel line connections, hose clamps, fuel pump, and fuel outlet tube (located in fuel tank) for loose fittings. Anti-Siphon valve restricting fuel flow. Refer to “Checking for restricted fuel flow caused by Anti-Siphon valves.” PROBLEM: ENGINE RUNS TOO RICH Possible Cause Corrective Action Fuel level too high.
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