To test the motor itself, bypassing the relays and relay wiring, find the two heavy gauge wires that lead to the trim/tilt pump motor. One should be green and the other blue. You will probably be able to find a quick disconnect plug near where the wires exit the outboard engine cover that you can disconnect.
How does a trim pump work on a MerCruiser boat?
The trim pump connected to a Mercruiser boat engine raises and lowers the lower unit that drives your boat. When air enters the trim pump, the lower unit will not move when you press the trim tab switch.
How to fix MerCruiser trim won't go up?
Re: Mercruiser Trim goes down, but won't go up!!! Please help Then, Disconnect both of the blue wires coming out of plug C, with a meter or test light connected to ground, find out which wire coming out of plug C has power to it. Click to expand...
How do you fill a trim pump with hydraulic fluid?
Turn the fill screw on the top-right side of the trim pump tank counterclockwise with a flathead screwdriver. Pour hydraulic fluid into the tank until the level reaches the "Full" line. Replace the fill screw.
How do you test a trim indicator gauge?
Trim Indicator Gauge Testing Check gauge terminals and connections forlooseness or corrosion. Correct as required. Disconnect leads at gauge terminals. Connect a jumper lead between the red wireterminal on the ignition switch and the terminalmarked “IGN” on the indicator gauge. The gaugeneedle should deflect beyond the red arc.
How do you jump a trim solenoid?
Use a short piece of wire as a jumper and jump it across the small red and small blue wires on the UP solenoid. MOTOR SHOULD RUN but may just click. IF IT JUST CLICKS then jump across the large red and large blue wires.
Why is my tilt and trim not working?
If the motor operates, then the problem is a lack of power to the motor (faulty solenoid or relay, bad connections, etc.). Failed solenoids, relays and corrosion (at connections, relay sockets, quick-disconnect plugs, etc.) are some of the most common problems associated with tilt and trim system failure.
How do you fill a Mercruiser trim pump?
Items you will need Turn the fill screw on the top-right side of the trim pump tank counterclockwise with a flathead screwdriver. Pour hydraulic fluid into the tank until the level reaches the "Full" line. Replace the fill screw.
How do you get air out of tilt and trim?
How do you get air out of a trim engine? Then trim the motor up and down, try to add a little more fluid and trim it up and down again. Do this several times to bleed all the air out of the system, and then put the hydraulic fluid fill screw back in, wipe off the excess fluid and your power tilt and trim should work.
How do you test a trim pump?
1:142:42Mercruiser tilt trim NOT WORKING Fix and testing the pump - YouTubeYouTubeStart of suggested clipEnd of suggested clipIn order to test your pump. You're going to want to hook the ground to a battery up to this or yourMoreIn order to test your pump. You're going to want to hook the ground to a battery up to this or your black wire and a positive to either one of these this is your down.
How do you test a mercury trim motor?
0:391:48TEST YOUR TRIM MOTOR | 3-WIRE - YouTubeYouTubeStart of suggested clipEnd of suggested clipTake your positive cable hook to the positive on the battery. And you can touch one of these wires.MoreTake your positive cable hook to the positive on the battery. And you can touch one of these wires. And you can see the motor's turning in the clockwise.
How do you bleed a Mercury trim?
Use the power trim control switch to raise your motor. Engage the tilt support lock. Remove the fill cap for the power trim reservoir an ensure that the fluid level reaches the bottom of the fill hole. If it does not, add power trim and steering fluid until it does so.
What kind of fluid goes in tilt trim?
Be sure to use a high-quality marine-formula grease, like Yamalube® Marine Grease, so it won't wash off so fast. Protection. Keep the trim rams fully retracted when not in use to prevent corrosion build-up.
Is power steering fluid the same as power trim fluid?
Chances are you won't notice any difference. ATF and power steering are pretty close in viscosity, 30wt motor oil is way more viscous. If you needed a lot of fluid, your tabs would probably be slower with the 30wt.
How do you fill a hydraulic tilt trim pump?
4:228:11How to Fill a Tilt-Trim Outboard Motor - YouTubeYouTubeStart of suggested clipEnd of suggested clipGive it a couple pumps fill that up and what we're waiting to see is waiting to see hydraulic LutzMoreGive it a couple pumps fill that up and what we're waiting to see is waiting to see hydraulic Lutz start to spill out of there. So this thing best I can tell look like it was pretty.
What's the difference between tilt and trim?
The difference between tilt and trim on a boat is referencing the location of the outboard or the drive of the inboard. Trimming is used when underway and goes about 20 degrees of the way up and tilting is coming all the way up for storage. Did you know there are ways to use your trim to improve your fuel economy?
How does boat motor trim work?
Trim is controlled with a toggle button on the control lever or on the dash. The trim system uses hydraulic rams to change the angle of the outboard motor or sterndrive gearcase—and with it the angle of the propeller shaft—relative to the boat transom, through a range of about 20 degrees.
Why remove air from trim pump?
Removing the air from the trim pump makes your boat safer. The trim pump connected to a Mercruiser boat engine raises and lowers the lower unit that drives your boat. When air enters the trim pump, the lower unit will not move when you press the trim tab switch. With the trimming inactive, you cannot control the way the boat planes ...
How to replace a fill screw on a hose?
Replace the fill screw. Disconnect the leftmost (Up) line from the trim cylinder with an adjustable wrench. Place the end of the hose in a plastic container.
What is a mercruiser trim?
The MerCruiser power trim system permitsraising or lowering the stern drive unit for efficientoperation under varying conditions. Early sterndrive units used a mechanical tilt system in theform of a series of holes in the gimbal ring. Afterthe unit was set at the desired angle, an adjustmentstud inserted through the appropriate hole held itin place.
When to use dual solenoid trim pump?
dual solenoid trim pump is generally usedwhen an in-handle trim control is required or whenthe harness length would cause an excessive voltagedrop. The circuitry and its operation is similar
