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

90hp mercury outboard, 2 stroke, 6515071 54-88608 starts

Customer Question

90hp mercury outboard, 2 stroke,(###) ###-####54-88608 starts fine, reverse has good power, drive has no power under load. Compression is as follows-146,150,145,150,148,143. Ran good on initial test & tune for 10 minutes. Heard/felt clunk-loss of power. Help me baby Jesus, Help me Tom Cruise....
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello Brian. My name is Tan.

Have you done a spark test yet? When you are running the engine under a load in forward gear push the choke in does it run better? Squeeze the primer bulb when under a load in forward gear. Does engine run better?

Related Boat Questions