31
Jan
If you look at the fuel line once it goes into the engine it snakes between the intake manifold and the block where heat soak could heat the fuel when the hot engine is shut down. Even if none of this happens burning E-10 fuel gas with 10 ethanol in your outboard motors and engines will get you 3 lower mileage than burning straight gas due to a lower burn temperature.
Most common problem cause.
Outboard motor fuel line problems. A blocked outboard fuel line prevents fuel from getting to the motor. It generally starts with a partial blockage where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. Fuel Line Problems Squeeze bulbs have a check valve at both ends that allows fuel to only flow in one direction–from the tank to the engine.
When the outboard is running normally the engines fuel pumps create a slight vacuum in the fuel hose. Outboard Fuel Line Problems. Finally if you are struggling to get your outboard running correctly you might consider looking at the fuel lines.
Blocked fuel lines keep gas from getting to the engine. Most of the blockages start out partially. In these cases simply pumping the primer bulb or playing with the hose will start the motor.
Fuel system problems. The most likely problems to beset older two-stroke outboard engines are with the fuel system. Modern fuels have a shelf life of only a few months especially when mixed with two-stroke oil with the fuel leaving a black varnish or gum on the inside of the carburetor when it evaporates.
If theres fuel in the tank the problem may be a faulty check valve. You can check the patency of the hose and the check valves function by doing the following. Remove the fuel hoses engine connector from the engine and stick one end of a paper clip into the steel ball end.
This will open the connector to air. Most common problem cause. Undersize fuel lines or fittings and air leaks.
As a general rule all fuel lines need to be a minimum of 516 8 mm ID up to 4 cylinder or about 130 HP engines and 38 10 mm ID above that. In addition all hose fittings hose tails tees pick-up tubes etc need to be a minimum of ΒΌ 6 mm ID. I recently needed a new fuel line and connectors and I went and bought the wal-mart standard OMC JohnsonEvinrude line.
My motor is a 1984 60 hp Johnson. The problem is the motor fuel connector will not go on and after looking at it doesnt resemble the typical johnson connector that has a barb on the fuel port. Cheap fuel lines hose clamps and connectors commonly cause problems with your outboard engine.
First squeeze the ball as you watch the fitting between the engine and the line the barb and the hose the barb on either end of the ball and if its visible the fitting between the line and the tank. There are different causes to this depending on your engines. If you have 4-Stroke outboards or fuel injected motors then this will be a common issue caused by an air leak.
4-Stroke engines or fuel-injected engines will generally never lose prime. The engines store fuel in either a. Ethanol-blended fuel problems.
Fuel systems that use ethanol-blended fuel can experience issues like sputtering or losing power if the fuel goes bad. Its good to have a spare filter on board as well. Your outboard motor is the heart of your marine vessel and if it is having trouble with the fuel supply it can put a damper on your day on the lake river or ocean.
Two of the most common problems when it comes to fuel supply in your outboard motor are bad fuel and a bad fuel filter. If you have one or both of these. Clear Clogged Fuel Filter Line.
The fuel filter can clog up the fuel line. Remove the filter from the fuel line. Now use a solvent cleaner or carb cleaner and clean the filter.
Then reinstall the filter in the fuel line. Make sure the line is clean and the gunk from the filter is not stuck there. Clean Gunk in Jets.
Even if none of this happens burning E-10 fuel gas with 10 ethanol in your outboard motors and engines will get you 3 lower mileage than burning straight gas due to a lower burn temperature. Being proactive about ethanol fuel issues will keep your motors running the way they should. However these two problems are the most common boat or outboard motor issues that you may encounter with almost every available outboard or boat.
Power loss problem may occur either because of faulty spark plugs or kinks in the fuel lines fuel filters. If you look at the fuel line once it goes into the engine it snakes between the intake manifold and the block where heat soak could heat the fuel when the hot engine is shut down. I have thought about running the line down below the block and back up to the low pressure pump avoiding the hot block.
Just a few things to try. For both issues you must refer to the outboard motors service manual. This will help you run all inspection and testing procedures.
If this is this is your issue many boaters will need the help of a qualified marine engine mechanic. Loose fuel line connections pinched or blocked fuel lines. Fuel fittings such as this one can corrode and clog up causing significant performance issues in outboard engines.
Photo courtesy of Yamaha. Check the Fuel Connector. Another trouble spot in the fuel delivery departmentif youve got a portable tank setupare the snap-in connectors that attach the fuel line to your outboard.
IDO Community Forums Fishing Forums General Discussion Forum Outboard fuel problems. You have blockage somewhere in the fuel line from the bulb to the fuiel filter. My guess is a gummed up carb or a bad fuel pump.
I need to have this motor ready for this weekend so im going to.