2002 26' Sundancer 5.7EFI Wont Start

[SpenRay]

Hi All,

I took my 2002 26' Sundancer with 5.7EFI out a couple of times this Spring and it ran great. I had a service done (Impeller, Oil Change, Fuel Filter, Spark Plugs) went to take boat out I went to accelerate, and it began running really rough and it would not go above 2K RPM / 10 MPH. Returned to my slip, had the mechanic come back who thought it was bad Spark Plug Wires, Cap, Rotor. Replaced them then the boat wouldn't start.. Mechanic ran the computer and it showed 2 codes, he cleared them (did not write them down) and boat started. I took it out and went 30ish MPH easy. Stopped at a friends dock, hung out for a bit, boat started right up and went back to slip. I went back a few days later and the boat would not start mechanic said he was stumped. I went to a different mechanic and her ran the computer and it showed 1 code (misfire) he noticed spark plugs were not gapped correctly, and timing was advanced (likely by previous mechanic) he corrected, and boat started and ran multiple times. I went back the next day and the boat will not start again..

Anyone dealt with something like this? or have any thoughts?

 

[Espos4]

When it “does not start”
Does the starter spin?
Does it engage the flywheel?
Does the engine rotate?
Do you only hear a “click”?

we’ll need more specific info if you want this diagnosed over the internet.

 

[Scott215]

So your saying the engine turns over but wont start, is that right

 

[Lazy Daze]

Ditto to what Espos4 mentioned - need clarification.

Could be as simple as a loose connection.

 

[SpenRay]

To answer Espos4: Starter and, flywheel spins... no clicking sound.

I have a short video from today that I am trying to attach, but it says the file type is not supported... If anyone knows what video format is supported I will upload to help make more sense.

The mechanic got it started yesterday, and it idled great. He started it multiple times. Said there was a loose/broken wire coming from distributor that he cut, and replaced. I went out today and it would not start.. I purchased a new "ignition sensor assembly" hoping that helps, but mechanic will be gone for a few days so not sure when he will install it.

When I turn the key 1 click I can hear what I assume is the fuel pump for a few seconds. if I flip the safety switch on the throttle from "Run" to "Stop" I do not hear the fuel pump when I turn the key 1 click.

It sounded super close to starting today, almost like it wasn't getting enough fuel.. turning over and almost sputtering to a start but just wont do it..

 

[SpenRay]

Found a website that allows me to put the video clip up for 5 days.. Hope this helps make more sense.

https://tempclip.com/en/N2gX4ydhGoHnnDw/watch