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2005 90 TLRD will not idle. Engine will start, initially revs to approx 1200 rpm, comes back down to around 750 +/- rpm, idles about 10 seconds and dies.
Engine has set for several months with only occasional start up and run for approx 15 min each month. I put Marine Stabil (storage dose) in the fuel system and ran the engine to make sure it was throughout the system.
Engine will start and run at idle with the emergency fuel enrichment valve set to the open position. Neither my owner's manual nor my Yamaha service manual give any sort of explanation of the function of the switch. The owner's manual gives a brief description of when and how to use the switch. What is the function of the emergency fuel enrichment switch? When I close the switch after the engine is running (as per owner's manual instruction) the engine dies. If I return the switch to the normal position and attempt start, the engine will start but not run past initial start as described above.
Would someone please explain the function and purpose of the emergency fuel enrichment switch.
Does anyone have constructive advice on what possibilities may be causing the engine to not run in normal operating mode?
I got 3 gals of fresh gasoline in an auxiliary tank, flushed the internal fuel system, drained the filter bowl, drained the carb bowls to ensure I did not have bad fuel in the system. Fuel in filter bowl was clean, no water nor particulate matter. Fuel in carb bowls was a little dark but no particulate matter nor water.
I also put new Yamaha NGK spark plugs in.
Thank you in advance for your help.
Engine has set for several months with only occasional start up and run for approx 15 min each month. I put Marine Stabil (storage dose) in the fuel system and ran the engine to make sure it was throughout the system.
Engine will start and run at idle with the emergency fuel enrichment valve set to the open position. Neither my owner's manual nor my Yamaha service manual give any sort of explanation of the function of the switch. The owner's manual gives a brief description of when and how to use the switch. What is the function of the emergency fuel enrichment switch? When I close the switch after the engine is running (as per owner's manual instruction) the engine dies. If I return the switch to the normal position and attempt start, the engine will start but not run past initial start as described above.
Would someone please explain the function and purpose of the emergency fuel enrichment switch.
Does anyone have constructive advice on what possibilities may be causing the engine to not run in normal operating mode?
I got 3 gals of fresh gasoline in an auxiliary tank, flushed the internal fuel system, drained the filter bowl, drained the carb bowls to ensure I did not have bad fuel in the system. Fuel in filter bowl was clean, no water nor particulate matter. Fuel in carb bowls was a little dark but no particulate matter nor water.
I also put new Yamaha NGK spark plugs in.
Thank you in advance for your help.
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