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Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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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: 7 months ago.
Category: Boat
Expert:  Tan replied 7 months 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?

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