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Hello, my name is***** will assist you.
About how long and at what RPM would the engine run?
Ok, can you test the fuel pressure that is going to the fuel rail?
Great, let me know what you get at key up. Lets the pumps finish their run, and you should have a good reading.
Ok, when you had the boat out, how long could you run before it cut out?
Is there a primer bulb in the fuel line?
When you had it out the other day. Would it run for a few minutes, a few seconds?
Have you made sure that there is not any water in the fuel tank?
Remove the primer bulb. This engine does not need one, it can cause problems on this engine.
Ok, do you have a way to apply 12V DC to a socket to do a test on the low pressure fuel pump?
Yes, the 6 wire plug going to the FSM on the front of the engine controls the fuel pumps. Apply 12V positive to the Orange and 12V negative to the Brown. Part 1 is this harness. You should hear a pump run.
There are two pumps located inside that housing, we know that the high pressure is running, you have pressure, but we do not know about the one that draws fuel from the tank.
Sure, when was the last time that it was replaced?
But the engine is 6 yrs old.. Spec is every 300 hrs OR 3 yrs, whichever comes first.
Well not having water flow, is a good indication, but you could also have a plugged tale-tell hole. Yet, that water flow does not come from the block, it comes from the FSM. And the engine overheating is another indication.
Yes, change the impeller.
The impeller is located at the top of the gear case. It is part 33
How low did the pressure get?
For the vid, if you could post it to a file sharing site, like youtube, you could send me the link.
We are going to need to test the lift pump, do you have a way to supply 12V to the connector for the pump?
That is the test that I need to know about.
Yes, I saw the vid. you have already unplugged the connector and tested the pump?
ok, Locate the hose on the top of the FSM that does not have a quick connect. Follow it to the intake, remove it there. Then try to blow into it. Can you move any air through it?
that was blowing toward the FSM correct?
Ok, that is good. How do the plugs on the engine look?
does the oil level seem to raise?
Yes inspect the plugs. I would like to know if any of them are fouled now.
Check your oil level. Make sure that it is not overfull.
It can be. does it smell like fuel?
Ok, check the thermostat and make sure that it is not stuck open.
No its closed.
Does the engine run smoother at higher RPM?
Was the water on?
ok, it is running out of fuel. Make sure that the fuel line from the boat to the engine, is not coming apart on the inside. if that is still good, the FSM will need to be removed and opened up.
Remove it and open it up.. Make sure that the pump filters are clear and that the small hose inside it is not broken.
How is the hose there. Move it slightly to see if it is cracked. The float looks to be an older one. It could be the issue. There have been several design changes on it.
While it is apart, test the low pressure pump again. Make sure that it sounds like it is running full speed.
I would replace the float.
Using resistance. Measure between the pins, thru the float upside down and right side up, the reading should change.. How much fuel was in the FSM when you opened it?
Ok, the pump does sound a bit rough.
Sure. Just to make sure that it is fine.
Clean the plugs, the oil needs to be changed, the T-stat is ok. With the engine sitting, I would have the injectors cleaned as well.
Remove them and take them to a shop that cleans injectors.
Set the meter to read resistance. that is the Omega symbol. Use a low scale, place the meter leads to the pins in the float connector. Hold them there as you turn the float from ride side up, to upside down. The reading is supposed to change.
If you need to, send me a pic of the meter.
The reading should have changed. Sounds like it is stuck in one position electrically, even though it is moving on the inside.