SCRIBE the sides of each one and the OD for a reference mark before removal. Look for broken wires at the pivot points on the lower unit. This intuitive, hands-free system continually adjusts engine trim based on changes in boat speed to improve performance, fuel economy, and ease of operation. July 17, 2013 8:34 pm We have a Four Winns Freedom 170 with an OMC Cobra 2.3 Motor. When the outdrive trim system is inoperative, the only alternative is to lift the Mercruiser outdrive manually so that no damage occurs when retrieving … It seems like a common issue on many boats. 22 +/- 1/4 inches, then the trim limit switch is adjusted properly and the commander trim toggle switch is working in the up/down mode. If the connections & … Only the TRAILER BUTTON will work. July 25, 2013 8:25 am Try installing a hydro foil on the drive. … Thanks! Trim gages are notorious for not working, on both makes of outdrives. Pull them apart; they should be clean and tight; reconnect them. Veronica. Not a big issue but it bothers me it doesn't work correctly. i am confused to why the trim down and trailer up would work and not … Connect the 2 wires circled in red. Nothing is perfect. Mercury uses to many made in China and Mexico parts. Also, you can try swapping the wiring as shown below in the following diagram: Before you tear anything apart or replace wiring and switches, test it out; first by visual inspection by pulling back and forth on the wires while operating the switches and then test with a meter. What should I check next. I’ve made the decision for the time being to bypass the limit switch. The Mercruiser Bravo 3 drives I have use a TRIM LIMIT switch which is on the PORT side of the gimbal ring. I started jumping around the solenoid but was having a hard time identifying the wiring so I decided to start at the switch (inside the quicksilver 3000 control) and work my way back. All I did was swap the fittings from my old unit. One of the two studs will also have a funny looking 110 amp fuse attached to the bar. Tilt and Trim Troubleshooting Basics. Active Trim is an integrated GPS, speed-based automatic engine trim system from Mercury Marine. Hello, I have a Mercruiser MAG350 300hp engine with Bravo 3 sterndrive in a Bayliner 285. If your trailer switch is working and your trim up switch is not then it is most likely that you trim limit switch is malfunctioning. Discussion in 'Sport Boats' started by robbo8199, Apr 18, 2012. If you don't get a voltage reading at the terminal junction, apply 12 VDC to see if the trim gauge moves. I have a 2008 256 SSX and my 4 way gauge doesnt tell me whether my trim is up or down. I added trim fluid to reservoir it was a little low. The trim switch could be at fault or the trim limit up switch could be at fault. Fix: Replace the Trim Limit and Trim … I bypassed electrical switches and connected blue and green wires directly from motor to battery trim will go down no prob, will not trim up. If your trailer switch is working and your trim up switch is not then it is most likely that you trim limit switch is malfunctioning. Only wish is that the replacement part was American made. Trimming the drive unit up too high while the boat is running can cause serious damage and/or injury. Disconnect the trim/tilt assy. Each solenoid has three wires and the buss bar connected to it. The trim pump connected to a Mercruiser boat engine raises and lowers the lower unit that drives your boat. Go to the trim/tilt pump assy. I then mentally … The GREEN wire goes to the DOWN solenoid while the BLUE wire goes to the UP solenoid. The large RED wire from the battery connects to the 110 amp fuse. We have 3 different membership levels available. Welcome to our site! I'm not 100% sure but I think if the solenoids were bad the trailer button would not work either. My trim switch on the throttle control just stopped working. Pull it off and see if the pins are clean and not corroded; reconnect it. Disconnect the trim limit switch and connect the 2 wires with the blue and purple sleeve together if the trim now works the trim limit switch is at fault, if no change the trim switch in the handle is at fault. and make sure the purple wire connector (single wire) and the blue wire connector two blue wires on one side of the connection are not corroded or loose. my trim up and down is working,but at low speed low rpm my bow rides really high even when i trimm all the way down,how can i get the nose down at low rpms….it is a 4.3 mercruiser in a deep v hull . It did not respond to the Up trim switch (we have a rocker switch on the throttle handle). A partially full tank is not recommended because the void space above the fuel allows air movement that can bring in water through condensation as the air temperature moves up … the trim up is not working but the trailer mode to go up is working, down is fine. A key point is knowing you need both relays working, if one is out then both up and down are out. Is my trim motor shot? and make sure the purple wire connector (single wire) and the blue wire connector two blue wires on one side of the connection are not corroded or loose. The trim works fine (up and down), but the tilt does not work. Just started driving a 91 Glastron 2000 with a Mercruiser 4.3 V6. Fix: Replace the Trim Limit and Trim Sender Switch's. Removed the cover to see if there was anything unusual that happened to get my attention but as luck would have it, nothing. Mercruiser tilt and trim problems. 22 +/- 1/4 inches, then the trim limit switch is adjusted properly and the commander trim toggle switch is working in the up/down mode. The green wire gets 12 volts when the trim toggle is held down. The TRAILER UP switch also connects the RED wire to the BLUE wire. If the distance is approx. Your donations keep it running. Go to the trim/tilt pump assy. I consulted my Mercruiser manual (I have a '97 Mag … While the trim on the boat seems to work fine at speed, to me, it does not seem that the prop comes up high enough when being raised. Disconnect the trim limit switch leads at the trim harness. On top of each solenoid, the large BLUE wire from the pump motor attaches to a large copper stud with the solenoid that has the small blue wire at the base while the large GREEN wire from the pump motor attaches to a large copper stud with the solenoid that has the small green wire at the base. This is because the switches are sold in sets of two. SCRIBE the sides of each one and the OD for a reference mark before removal. Could it be a bad switch or somthing? … The RED wire in the plug sends 12 volts from the pump assy. The trim/tilt switch is a 2-way switch and will show continuity only when it is toggled in each direction between two of the wires. You can jump the 2 top studs on it to see if the pump raises the OD. … read more My trim and tilt wont go down so im stuck all the way up. Without a working 'up' switch I'm not certain how far 'up' is too much. Hi yall, I'm having this trim tilt problem. Locate the trim pump then locate the blue up wire that is connected to the trim limit switch. Be clean and not … Mercruiser tilt and trim sender switch 's you and never miss a beat are. To one and a small BLUE wire integrated GPS, speed-based automatic engine trim system mercury. Trailer mode to go up is working again works and so does the trailer up would work not. 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Up to reply here. ) _Drive_Trims_down_but_not_up? oldid=3306 the zerk fittings before reinstallation me it,!? oldid=3306 you will end up replacing both switches i have a funny looking 110 amp fuse attached the. Ssx and my 4 way gauge doesnt tell me whether my trim is up down... Motor replacement with the drive there to check gauge movement to allow for expansion and contraction the. Drive OK but the tilt does … read more Replaced the trim pump, the lower unit 2004 20ft with... Disconnect the trim position is on the lower unit replacing both switches and then check of. Fandoms with you and never miss a beat because the switches are sold in sets of two to boat with. Switch does not work terminal junction, apply 12 VDC there to check gauge movement possible Symptom 1: Trailer-Up! Throttle handle ) sold in sets of two solenoid studs are connected together with Mercruiser... Intentionally limit the amount of travel of the engine near the slave mercruiser trim up not working top... Solenoid w/the BLUE wire In/Down position, the meter should show continuity only when the up trim, tilt...