25
Feb
A diy video showing the steps to replacing a failed tilt and trim motor on a late model 25 30 40 and 50 hp yamaha 4 stroke outboard. Allegedly this defect allows hot gases to corrode the exhaust passages which in turn can lead to holes in the passages and can eventually cause a loss of horsepower smoking and engine failure.
Prime the bulb and keep an eye on that hole in the back of the pump.
Yamaha 40 hp outboard problems. Yamaha 40 4 Stroke problem. I have a 2001 Yamaha 4 Stroke 40hp. I have had absolutly no trouble out of this motor until now.
The problem is that it will start and run fine until put under a load in the water. When I put it in gear and try to throttle up it wants to cut out and try to die. I am having a problem with my 40 HP 2004 Yamaha 4 stroke.
It starts and runs well on idle and up to about 1200 rpm. When I accelerate the engine it seems not to fire on all cylinders IT shakes through about 1500 rpms - then it runs fine as the boat comes to plane. There are 3 carburetors 3 of them which have been cleaned twice.
But no real improvement – also have put a Yamaha water. Hello I am here on behalf of my brother. He is not real good with posting questions in the forums and such so I am posting this for him in the hopes I may help.
He has a 1998 yamaha 40 hp outboard motor and has been having some problems. The motor starts fine and idles terrific once the boat gets going and he accelerates to full speed he is good for about 2 mins and then the motor. The Yamaha outboard forum marine engines will help you find answers to Yamaha outboard problems 4 stroke Yamaha outboard problems 4 stroke Yamaha 40 hp 4 stroke problems Yamaha 200 outboard problems Yamaha 4 stroke outboard problems Yamaha 50 hp 4 stroke problems Yamaha 60 hp 4 stroke problems and Yamaha 70 hp 2 stroke problems plus a lot more as well.
Allegedly this defect allows hot gases to corrode the exhaust passages which in turn can lead to holes in the passages and can eventually cause a loss of horsepower smoking and engine failure. Unfortunately for consumers this alleged defect cannot be readily discovered and is hidden in the engines internal aluminum exhaust component coatings. DOWNLOAD Yamaha 40hp 40 hp Repair Manual.
A downloadable Yamaha 40hp outboard repair manual is a digitally transmitted instruction book that details the procedures of maintaining and repairing an outboard motor. These manuals vary with respect to the manufacturer and in regards to the models of boat engines produced by the manufacturer. Youre not going to be burning that much gas anyway so economy isnt that big a problem.
Lighter is always better particularly as boats get smaller and since you fish skinny water a 2-stroke is a good choice. Older is also good if you fish the Nature Coast. Corrosion and salt build up anodes melt away scaling clogs passages and gets into places it doesnt belong and then youre left with major damage and a major repair bill.
In fact Chris showed us the inside of an outboard that hadnt been flushed regularly and it was a messto the tune of thousands of dollars in repair bills. A problem in the fuel compression or ignition systems can cause poor starting loss of power or other problems. This basic troubleshooting and possible remedies and covers all Yamaha outboard motors.
Therefore some items may not apply to your model. If any more questions please consult your Yamaha dealer or the experienced service shops. Yamaha 40hp 2 cycle Alarm signal Is it a long continuous beeeeeeeeeeep or beep beep beep the continuous beep means its overheating and that beep beep beep means there is an oil injection problem.
Check the fuel lines connecting the outboard motor to the fuel tank. If any breaks or leakages are found immediately stop use of the outboard motor and take it to the shop for repairs. If gummy or watery fuel is found have the fuel tank drained by a Yamaha dealer to remove any contaminated gasoline.
Yamaha Four-Stroke Outboard Motor Corrosion Defect Complaint. The complaint for this lawsuit alleges that Yamaha Motor Corporation USAYamaha fraudulently sold a line of four stroke outboard motors after it became aware that the engine design had a safety defect that caused component parts to prematurely corrode in violation of California Consumer and Unfair Competition. Yamaha Outboard Starter Troubleshooting and Replacement.
If playback doesnt begin shortly try restarting your device. Where Yamaha engines deliver 37 knots Suzuki marine motors are able to take it up to 40. So even though Yamaha is the topmost outboard engine manufacturer Suzuki is the winner here.
When you run the engine at about 3500 rpm Yamaha will make noticeable noise as most engines do. As you increase the rpm the engine will make even louder noise. Start by unscrewing and removing the electrical cover.
Next use a pair of pliers to remove the fuse holder. If you find that the connection at the center of the fuse is broken then youre dealing with a blown fuse. Youll need to replace it with one of the same amperage which you can find listed in your Yamaha outboard owners manual.
When you have the filter changed make sure you have a 10 micron fuel water seperator filter installed ahead of the outboard between the tank and the motor. It can get real expensive to have the injection system cleaned compared to the water seperator filter. I have a 2004 F150 with zero problems since new.
Change the 10 micron filter. To start and run a Yamaha outboard needs a properly timed ignition and correct airfuel ratio. Also be sure to check if the emergency shutoff switch cap is in place.
If it still wont crank check the neutral switch. If you hear a clicking sound when the starter motor attempts to. Simply select your outboards make year HP and model and pick the OEM parts you need for your engine.
For example on the Yamaha 250HP LF250TXR outboard parts page click on Fuel 1 to find the primary fuel filter. Click on Fuel Injection Pump 1 to find the fuel pump. And click on Fuel Injection Pump 2 to find the secondary fuel filter.
Troubleshooting a Yamaha outboard motors tilt and trim is fairly straightforward usually involving a thorough visual inspection and a check of the hydraulic fluid level. Things to look for include any build-up of dirt and sand as well as a lack of sufficient or appropriate grease. If its a fuel problem rebuild the carb replace the fuel filter replace the fuel line replace the fuel tank replace the fuel pump.
Then lets replace the spark plugs let try the water pump. A diy video showing the steps to replacing a failed tilt and trim motor on a late model 25 30 40 and 50 hp yamaha 4 stroke outboard. Attach another fuel line to the outlet and clamp it off tightly.
Prime the bulb and keep an eye on that hole in the back of the pump. If fuel is visibly leaking through it your diaphragm is bad. Fuel pumps can easily be repaired using the proper fuel pump.