How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
Type Your Boat Question Here...
Dominick is online now
A new question is answered every 9 seconds

I have been making oil. 90 yamaha four stroke. first jar was

Customer Question

I have been making oil. 90 yamaha four stroke. first jar was regular sae oil. didnt seperate took to a couple places all said gas in oil. changed feul pump and had injectors cleaned and said they all spray. they could not presure test. only place in town and said two small to put on there tester. put back together . used better marine oil and took out for a couple hours close in. allways has been running great. came back in made oil. plugs all fireing and grey collar on ends.this time oil is seperating. Day two and darker on top one half and milky on bottom half. only about one half quart of oil was what is it water or gas. most likely was is going on. thanks
Submitted: 3 months ago.
Category: Boat
Expert:  Jason replied 3 months ago.

Hi Mike, my name is Jason.

Does the oil smell like gas, or does sit smell like just oil?

Is there a history or a story to this problem? Have you owned the boat for a long time and then all of a sudden it's doing this? Or is this a new to you engine?

Related Boat Questions