Mercury Optimax 150 startup issues

[jj1987]

Good Morning,

I have a Mercury that's not wanting to start up. Here's what happens
https://www.youtube.com/watch?v=E6hiV8ctpuc&list=UUQvi5aJ1wVrNWnR84pkIuUQ

When I turn the ignition key to run, I can hear the fuel pump run for 2 seconds or so.

Could this be flooded? For some reason, I thought I remembered hearing you cannot flood an EFI?

 

[bilge rat jim]

Nice videos, especially the cucumber peeler! :laugh: Can't quite see the position of the throttle, but it almost looks like you are using the fast idle function when trying to start the engine? If so, don't.

 

[tlh 178]

wild guess on my part, there is a small fuse box on the back of the motor. it only holds 4 fuses. i had this issue once and that fixed my problem.

 

[jj1987]

wild guess on my part, there is a small fuse box on the back of the motor. it only holds 4 fuses. i had this issue once and that fixed my problem.

The yellow fuses right by the ECU? Checked all those and they're brand new :-/

 

[jj1987]

Nice videos, especially the cucumber peeler! :laugh: Can't quite see the position of the throttle, but it almost looks like you are using the fast idle function when trying to start the engine? If so, don't.

I tried that out of desperation, but similar behavior was happening before I started doing that. I tried cranking this morning and didn't do that, same thing happened.

 

[bilge rat jim]

OK, lets start by looking for water or other crud in the fuel. Even though you're not getting a "water in fuel alarm", I'd remove and inspect the filter on the Vapour separator, and drain the secondary side of the VST.

 

[jj1987]

OK, lets start by looking for water or other crud in the fuel. Even though you're not getting a "water in fuel alarm", I'd remove and inspect the filter on the Vapour separator, and drain the secondary side of the VST.

I hooked it to an external fuel tank, with fresh fuel to eliminate fuel issues as well. Sorry-- I should have put that in my original post.

 

[bilge rat jim]

I hooked it to an external fuel tank, with fresh fuel to eliminate fuel issues as well. Sorry-- I should have put that in my original post.

That's good, but it won't eliminate water that's already in the VST.

 

[woody66912]

The opti has to make 1 1/2 turns of the fly wheel so the cps can find # 1 cyl, make sure the battery connections are clean and tight. if they are your starter my need a rebuild.

 

[schematic]

make sure you have spark to all cylinders

 

[jj1987]

make sure you have spark to all cylinders

thanks, checked this as well.

boat is in storage for the week, but it appears that the VST is the last thing to check.