How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dominick Your Own Question
Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
14379177
Type Your Boat Question Here...
Dominick is online now
A new question is answered every 9 seconds

2001 Yamaha 225 hp ox66 The problem is when start the engine

Customer Question

2001 Yamaha 225 hp ox66
The problem is when start the engine and ready to engage its shuts off after that spark plugs are wet with the fuel and have a black color
I have to wait for the engine to cool off and clean all the spark plugs to restart the engine again and it will do the same thing again
Submitted: 3 months ago.
Category: Boat
Expert:  Jeff G. replied 3 months ago.

Hi, I'll need a few more details.

Is the engine getting hot? You said it has to cool off. How long does it run before stopping? Is it stopping just when you go to shift or when in neutral or in gear?

Has anything been done to this engine lately?

How are you cleaning the plugs.

Can you do some basic checks and tests?

Customer: replied 3 months ago.
FUEL PUMP ASSEMBLY WITH FUEL PUMP GASKET
VAPOR SEPARATOR FLOAT CHAMBER GASKET
FUEL PUMP FILTER
ENGINE MOUNTED FUEL FILTER ELEMENT WITH O-RINGS
Customer: replied 3 months ago.
It takes about an hour to cool off
Customer: replied 3 months ago.
It runs well on idle than shuts off when shifting
Expert:  Jeff G. replied 3 months ago.

Couple things come to mind.

First is the shift switch. Look at the linkage and bracket where the shift cable connects to the engine. There is a shift switch. If this is out of adjustment or sticking then it will cause the engine to stall when putting in gear.

Have a helper in the boat, engine off. Disconnect the shift switch and put an ohm meter, a cheap $10 multimeter will work fine for this. And while your helper shifts with the control in the boat watch the ohm meter for open and close. While he shifts spin the prop to help engagement. See if the shift switch sticks.

The other thing to check is the throttle position sensor, tps. Look at the top port side of the engine. The TPS is connected to the throttle linkage there. See if the TPS has been moved. There will be indentations where the washers were originally.

Post back what you find.

Related Boat Questions