2005 SX230 Two issues came this morning

[Havalon]

Bought the boat 2 months ago and everything running fine.

1.) Ran for about an hour this morning, stopped for a few minutes, turned on blower before we went again and after about 30 seconds of turning on blower it makes a loud vibrating sound yet still blowing air fine from both hoses.

2.) Again, everything going good for past 2 months. Was running a about 10krpm's for about 15mins straight and oil pressure light comes on. Slowed down, restarted engines, oil light cleared and took it in back home about 8500/9krpm's no oil light comes. Checked oil levels everything looked while had engine off.

Any help appreciated, thank you.

 

[Gym]

Bought the boat 2 months ago and everything running fine.

1.) Ran for about an hour this morning, stopped for a few minutes, turned on blower before we went again and after about 30 seconds of turning on blower it makes a loud vibrating sound yet still blowing air fine from both hoses.

2.) Again, everything going good for past 2 months. Was running a about 10krpm's for about 15mins straight and oil pressure light comes on. Slowed down, restarted engines, oil light cleared and took it in back home about 8500/9krpm's no oil light comes. Checked oil levels everything looked while had engine off.

Any help appreciated, thank you.

Ok, blower fan vibrating. Shut Dan off vibration gone. Just kidding. check that fan if firmly mounted. If so there may be debris in fan cage.
Are you positive that was an oil light and not the overheat light? They are very close together. I'm thinking possibly an overheat st high speed. Was or is the boat being used in salt water? The engine cooling journals may be crusted with salt.

If you're sure it's oil pressure...Have you changed oil & filter recently? If not start there. Use a 10w40 synthetic blend or pure dino oil. Full synthetic may cause slight oil seepage around pan gaskets.