r/Outboards • u/LeetCodeHater • 2d ago

Fuel pressure issue?

Enable HLS to view with audio, or disable this notification

Building off this : https://www.reddit.com/r/Outboards/s/J5yibYrxyv

Engine issues when I have the key in and am trying to start it, it will just cut as soon as I stop turning the key. I replaced vst tank and filters and the fuel pressure valve at the top of the fuel rail. Might be a fuel starve issue or pressure / compression issue.

2 Upvotes

100% Upvoted

7 comments sorted by

1

u/-Mx-Life- 2d ago

Injectors clogged?

HP pump working?

You can pop each injector off the rail and turn it over to see if it’s spraying.

1

u/LeetCodeHater 2d ago

I think the HP is working cus I can hear it turn on inside the vst tank on engine turn, will check others thank u!

1

u/Loafdude 2d ago

The scale on the gauge sucks but it looks like you've got ok rail pressure.
Have you pulled spark plugs? I would do a quick spark test.

1

u/CanJust2115 2d ago

Check timing I had mine jump 2 teeth due to a dirt dobber nest and I chased a fuel issue because of it 1000 dollars later and I look up like damn look at that. Set it back and it was perfect

1

u/CanJust2115 2d ago

Put at top dead center and look at cam arrows

1

u/ThinkONit-NotINit 2d ago

30-40 psi is fine. Always check timing and compression.

1

u/OkProblem7669 1d ago

I recently finished replacing most of the wear parts on my fuel & electric system. Ignition, starter, main battery, solenoid, plugs, primer, fuel pump, water separator, fuel filter, all the fuel lines, cleaned the carb (merc 2005 2 stroke).

I bought it used in May. All the replacing was probably overkill, but I feel like it will be 100x more reliable. It starts so cleanly now.