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Boat Repair/1999 Mercury 225 ilt

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Expert: Jeff Grigg - 1/6/2008


Question
1999 Merc 225 OB when tilt down, the relay blows.  If the up relay replaces the down, will work for several tilts but will blow the same relay again(down).  Is there a problem with this engine/control system?

Answer
You could have a hydraulic problem overloading the system or bad wiring. Pull off both relays and check for burned areas and corrosion. Check all the other wires in the system, particularly grounds. Check the main wire going from the powerhead to the trim motor, I have seen some where the wire was rubbed almost through going through the cowl.
Replace both relays. Post back with what you find.
Jeff

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Jeff Grigg

Expertise

Can help with most any question related to outboards, high performance, hull repair, rigging, if it floats and uses a motor. From a 9.9 on a aluminum boat to DFI two strokes. Outboard motors are my specialty. I can help with some I/O questions as well. Ratings are the only way we know if we are helping. If you are pleased with the help, please rate us. 20% don't bother reading my answers! If you are not going to read the follow up then why ask? Keep in mind we do this at no charge and are not paid. We do it to help you!

Experience

32 years in the marine business. Own a service facility, in coastal South Carolina certified Master Tech by Johnson/Evinrude, certified Mercury/Force, Tohatsu/Nissan. Former technical director for DMI Pistons. 30 year racing career including 3 APBA Formula V National Championships

Organizations
AMTECH, APBA

Publications Written For
Boat & Motor Dealer, Car Classics, Custom Vans (tech articles), Miami News, powerboat racing column

Awards and Honors
Certified Master Technician Johnson/Evinrude

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