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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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I have a pair of Mercury Verado L4 200hp 2009 (120 hours)

Customer Question

I have a pair of Mercury Verado L4 200hp 2009 (120 hours) running on 98 octane fuel on an Arrowcat 30. Starboard engine uses more boost at 4000rpm (10 vs 7) but boost is similar at idle and WOT. Together they burn 75 lt/h with Eco 19" props at 27 knots and get to ~ 5500 at WOT although this is in a 1m sea. Overall fuel economy is ~ 20% below expectation at 1.6 mpg at 4000. Port takes 5min longer to get to temp at idle and can be 20 degree cooler in this period. At 4000 port runs at 141 and starboard 147 degrees and fuel usage appears a little more on starboard but gauge. Had stale fuel with water in before I bought it and was often left sitting for months. Was serviced before I bought it but they missed a finger coil with connection showing an electrical burn so may have missed other issues. Any ideas/suggestions before I hand it to a tech are much appreciated but I suspect a thermostat isse. Next service due in October.
Submitted: 2 years ago.
Category: Boat
Expert:  MarineService8 replied 2 years ago.

Replace the pencil coils. New high and low pressure fuel filters, and clean the high pressure pump screen in the vst. Most common problems with the verado