22
May
Carburetor Starting system Prime Start To facilitate the starting of a cold engine an air-fuel mixture that is richer than normal is required. If your engine started life as a tiller steer has been converted to remotes then the electrical connection for the choke from the helm might be missing.
With Prime Start you no longer need to warm up your engine by revving it in neutral.
Yamaha outboard prime start system. The Prime Start is a cylinder-shaped device approx 58 dia directed mounted on the left side oil tank of the carb and has some hoses coming in and heading out. Also it has one black wire and one single blue wire. Never had much trouble starting 2 stroke outboards in the cold 70 is a hot day where I am from lol Snow machines seem to start better when it is -10 to -15but they are designed for cold weather.
But I can see the four strokes being harder especially the small pull cord engines as it is hard to get them to turn over fast enough when all the moving parts and engine oil is cold. Pull the line off the prime start system where it attaches to the intake behind the top carb and see if you can get any fuel out of it when you turn over the motor cold with it in the normal position. I do not only when it is in the open position does fuel get pumped out by the prime start pump.
Ive been through all 3 carbs. Cleaned and compressed air the whole 9yards. The motor will not idle very long but runs well at WOT.
I have to baby it to reach 1000rpms and then shell run. It is hard to start which leds me to think that there may be a problem with the prime start. I read that the prime start shuts down at about half throttle.
The Prime starter could be an electronic choke that is operated by a solenoid. If your engine started life as a tiller steer has been converted to remotes then the electrical connection for the choke from the helm might be missing. Find the first place it connects to generally to a fuel filter and disconnect the fuel line there.
Insert the clear hose into the fuel line prime up the engine and start it up. Let it run for a little while and carefully watch the fuel passing through the clear hose. The prime start is an electrical heat driven needle valve and is mounted on top of the carbie.
When cold the valve should be short opening the start fuel enrichment port. When hot the valve should be long closing that port. It sounds like bizzybs is stuck closed.
Googling prime start Yamaha diagnosis shows quite a few simple procedures to test its operation. Yamaha F50 Outboard Cold start problem Solved. The prime start device works like this there is a small fuel pump on the center carb where the manual enrichment is small red valve When the engine is cold the needle valve on the electro thermal valve the white thing with the blue and black wires in it mounted on the middle carb is retracted this opens up a passageway and allows fuel from the small pump to be sent down a hose to the.
The Yamaha outboard PrimeStart system is designed to help your engine fire up quickly every time even when the engine is running cold. It has a pump mechanism that ensures more fuel and less air pass through during cold starts for added enrichment. The prime start feature is an automatic enrichment circuit attached to the carburetor that replaced the choke system found in past Yamaha outboard.
Exclusive to Yamaha Prime Start makes starting a Yamaha outboard as easy as starting a car. It allows the engine to be started cold by automatically controlling the engine warming up process - eliminating the need for a conventional choke. You no longer need to.
I cleaned the carburators and the prime start system and put it all back on the boat. The engine started fine and runs great at speed. Thanks very much for the previous advise.
I did not spend the 100 on a new prime start part. However at idle the engine will suddenly cough and abruptly shut down. Yamaha Outboard 67F-14380-00-00 PRIME STARTER ASSY 2000 F100 Rating Required Select Rating 1 star worst 2 stars 3 stars average 4 stars 5 stars best Name Required.
This two-cylinder 362cc four-stroke outboard is extremely fuel efficient while producing a powerful and smooth-riding all-round performance. This engine includes Yamahas PrimeStartTM which delivers quick and efficient starting in all climatic conditions. For easy starting first time every time Yamahas Prime Start System delivers just the right amount of fuel required for combustion according to the engine temperature.
The engine will start with just a light pull on the manual starter or by turning the starter-key on electric start model. Prime Start makes starting a Yamaha outboard as easy as starting a car. It allows the engine to be started cold by automatically controlling the engine warming up process - eliminating the need for a conventional choke.
With Prime Start you no longer need to warm up your engine by revving it in neutral. Exclusive to Yamaha Prime Start makes starting a Yamaha outboard as easy as starting a car. It allows the engine to be started cold by automatically controlling the engine warming up process - eliminating the need for a conventional choke.
With Prime Start you no longer need to warm up your engine by revving it in neutral. 2021 Yamaha 2 stroke outboard. Motors for sale-short shaft.
Fuel Induction System. Bore x Stroke mm. 900 mm x 680 mm.
Trim Tilt. Starting system Electric with Prime Start system. Transmission ratio 175 2112 DIMENSIONS.
Recommended stern mirror height 635 mm. Weight with propeller 2600 kg. Fuel tank capacity Oil tank capacity 60 liters.
Digital Electronic Remote Command DBW control system. Trim and Tilt Power Trim. The Yamaha F15 is no exception.
The F15 produces excellent low down torque from a lightweight powerhead. For easy starting first time every time Yamahas Prime Start System delivers just the right amount of fuel required for combustion according to the engine temperature. Carburetor Starting system Prime Start To facilitate the starting of a cold engine an air-fuel mixture that is richer than normal is required.
For this reason the Prime Start system has been. Diagnose and repair a failed fuel pump. This motor was running poorly and stalling repeatedly.
The first problem was that the motor would stall and the own. Enjoy the extras that a Yamaha outboard also brings benefits such as computer-controlled ignition a special light-load starting system a water-cooled fuel pump and a large-volume silencer normally only found on larger engines. For commercial professional or leisure use this all adds up to a winning formula.