50 Hp Mercury 2-Stroke Losing Power At Wide Open Throttle

July 8, 2024, 11:14 am

It will take some cranking for the first start because the primer bulb only gets fuel to the pump inlet and not to the bowls. I also need help and have almost the identical problem. Liquids won't go through it (PB blaster, brake cleaner, acetone) even when forced by the compressor. Outboard motor starving for fuel at full throttle body. In case you find that your thermal relief valve is jammed or closed, the outboard motor will continue to run but will run rich on the idle setting. Nothing is more annoying than your engine not performing at the top end of its performance range, even at full throttle. I have a 2008 40hp (Engine Serial No.

Outboard motor starving for fuel at full throttle body
Outboard motor starving for fuel at full throttle sports
Outboard motor starving for fuel at full throttle seeking

Outboard Motor Starving For Fuel At Full Throttle Body

Any other suggestions? As a result, you will experience your outboard motor's RPM fluctuating up and down. Been changed, then I would suggest having your mechanic clean and service. What I don't know (yet): Condition of the carb, fuel pump or filter. Now, re-install the new emulsion tube and the new main jet and tighten them. The electric problem you are experiencing definitely sounds like the batteries are all hooked together. 50 HP Mercury 2-stroke losing power at wide open throttle. The ways in which the positive sides of each battery is wired may vary a lot from one boat to another. Thanks in advance for your help.

As long as the starter body doesn't get too hot to hold onto, you won't burn it out. 6] If the engine works fine, replace anti-siphon valve. Therefore, no matter what the throttle setting your boat is on, the air leak issue in your fuel line will have a significant impact on your boat's performance, ultimately restricting its speed. If you think a spun prop is the reason your outboard motor is losing power and your boat is unable to produce top speed, it is time you head to a local marine mechanic for repair. My next thought is to replaces fuel hose, bulb and 6 gal. A spun hub feels like a loss of power with excessive RPM. Outboard motor starving for fuel at full throttle seeking. I followed the fuel path to the boost pump and the inlet was completed choked with small particles of degraded fuel line. Next, install the new spring on the needle valve, snap the new needle valve into the new float, and re-attach the float to the carburetor by sliding the new pin in. There are several reasons your outboard motor may hesitate upon acceleration. I eventually got it running again but it would barely do more than idle.

Outboard Motor Starving For Fuel At Full Throttle Sports

Well, I thought the problem was resolved. This content was designed to serve as a general guide. Two different, local, marine dealers have told me it is the high pressure fuel pump. I have installed new fuel lines and rebuilt the fuel pump. If this is your issue, many boaters will need the help of a qualified marine engine mechanic. I'm new to builting a predator 212 I have one on my motovox 80 and I put 18 pound valve springs in the head arc billet rod arc billet flywheel hoping to fix my problem. No fuel = no start or hard starting when cold. Cutting this debris away may allow your blades to spin freely, solving the issue with the outboard motor struggling to run at full power. 5] Check the anti-siphon valve at the fuel pick-up, remove valve and retest. The fuel system seems to check out OK. Outboard motor starving for fuel at full throttle sports. After going through the OE Service Manual I ran the EMM led test. When I pulled the VST return filter it didn't appear to have much on it, though I did destroy it in the process. Before I rush off and spend money buying another fuel pump is there anything else I should try? Can I drill a tiny hole in it like with a #80 drill? It is now an intermittant fault.

I couldn't get the return filter out with the VST/pump installed on the motor so I removed it to get better access. You must refer to the outboard motor's service manual for both issues. Serviced this year but without tank and line. Starving for fuel at high R.P.M. You are not the only powerboat owner facing this issue, as it is a common problem that can happen for various reasons. Check your primer bulb—if damaged, replace it. Additionally, apart from the question of your engine operating at full power, we discuss what might be causing acceleration hesitation.

Outboard Motor Starving For Fuel At Full Throttle Seeking

Didn't have a problem like that after the first pump. Corroded Spark Plug Wiring. You should contact the service centre that did that quiet expensive service for an I-2 and ask if they did this filter. I have had someone squeeze the primer bulb and this still occurs. I did play a lot with the idle jets but didn't give much consideration to the primary jets when I was setting the carburettor up initially. Checked plug wires and fuses, everything OK. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. However, do so with care as you do not want to damage the spark plug. Registered: 1421549795 Posts: 6. 115 mercury starving for fuel - Boating and Boat Fishing. If there's fuel up to the valve's inlet but nothing coming out, replace the valve. What I know... Primer ball in the fuel line seems to be holding firm.

Fruitspice Posted October 9, 2014 Share Posted October 9, 2014 Hi guys am seeking help with my 1997 Mercury 2stroke 9. After recent trip to open water and full throttle for around 3 minutes the engine died. Is this for my model year? I have a 75 hp mariner motor that idles fine, and when running slow is ok. You should check your propeller regularly—after every few outings, if not after every outing. Check the idle mixture screw to see if it is out of adjustment.

I took it in for a service check due to its age and lack of use coupled with 2 missed 36 month service checks. You must check all fuel filters and remove any restrictions and contamination. Dirty or restricted fuel filters. Weak fuel pump or a restriction in the fuel system, possibly. The two poster before you have more knowledge then you will ever have so if you have not got anything useful to say do not say it. A quick safety warning here is that even if your boat seems to be operating just fine, working with a spun prop can risk irreparably damaging your propeller. Spark plugs are essential but inexpensive. Re-attach the air filter assembly with the filter. If you are experiencing issues with your boat reaching top speed, it may be worth a quick inspection.

Accelerating is fine, but after running at 6000 RPM for longer than about 30 seconds the car seems to lose power. 2] Is the engine running off a built-in fuel tank? Could not restart immediately.