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Here are some tips for tilt and trim troubleshooting. Yes, either electric motor is expensive but prices are not listed here as they seem to change about every six months or so. Have the engine in the up position and supported so that it cannot fall. Then after awhile it finally trims down to where we are not porpoising anymore. If the level is adequate, the problem is most likely with the hydraulic pump. Created by Fuelthemes. The tilt and trim unit allows you to optimize the performance of your boat by adjusting the angle of the engine, which, in turn, adjusts the boat’s running surface. Editor’s note: Please be sure to check your engine parts diagrams or our application guides to confirm the correct parts for your motor. To test the motor, the first step is to remove the power to it by disconnecting the blue and green wires. I watched all weekend making sure the Outdoor Network didn't come on. The Trim Position Switch operates the Trim Gauge. Mercruiser tilt and trim won t go down. First of all the trim limit sender is in the trim up circuit only, and will never prevent trim down even if you cut the wires off the thing. Save my name, email, and website in this browser for the next time I comment. Three (3 ) Wire POWER TILT TRIM Electric Motor: This PTT electric motor existed between 1976 thru 1981. If it does; replace the solenoid. ... Mercury outboard motor won't trim down Posted by SwampBandit on 8/1/19 at 12:54 pm to Bedhog. Then, after waiting a short time, the boater finds that the PTT unit is functioning properly once again. At this point, immediately take your finger off of the PTT trim switch. Look at the hole in the backside of the valve you removed. Older systems often used an electric tilt motor coupled with a mechanical lifting device, such as a worm gear. 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 next step is to check the operation of the power tilt and trim motor itself. I signed up for the Outdoor Network and they accidentally gave me the Playboy Channel instead. The power trim on the Mercruiser i/o does not want to go down. Neither by the trim buttons on the throttle controls or by the trailer legs buttons. It will take quite a rap but the idea is to unseat the valve to release the hydraulic pressure. Look straight at the PTT assembly…. are some of the most common problems associated with tilt and trim system failure. Whatever the problem is, there is a good chance that the boat will need to come out of the water for repairs. The Trim Limit Switch prevents the driver from 'over-trimming" the outdrive while under way. Trim up won't work on mercruiser in 1995 bayliner 1854 boat? Removing the air from the trim pump makes your boat safer. Keep checking the Res to make sure that it doesn't suck air. POWER TILT TRIM Electric Motors 1976 – 1992. When the Trim Position Switch fails, the gauge usually pegs to "full up". The Trim Limit Switch prevents the driver from 'over-trimming" the outdrive while under way. I have never seen another! Start by checking the hydraulic fluid reservoir level. Here are a couple of simple ways to isolate the problem. Worked good. You must devide these into groups. If the tilt and trim motor works fine but the engine won’t raise or lower, slips down when in the raised position or won’t stay trimmed, chances are that the problem is with the hydraulic pump or valve body assembly. The solenoid w/the blue wire from the pump motor is the up solenoid. The original part number is 391264 and supersedes up thru the numbers of 393988, 394176, 434795, with its last number being listed as 985237. Your email address will not be published. Copyright © 2015 The Voux, All rights Reserved. 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. If you try to raise or lower the engine and nothing happens, first check to make sure that the battery is charged and that the battery switch is in the “on” position. The tilt motor should run and engine should either tilt up or down. Watch your eyes as when you do release the pressure, it will have a tendency to spray out somewhat. When the Trim Position Switch fails, the gauge usually pegs to "full up". Fax: +1 (954) 522-2260 The time you most appreciate your motor’s tilt and trim feature is when it fails. This keeps the valve from jamming. Remove reservoir fill plug screw. The best way to try to free it without pulling the trim pump apart is to have somebody stand on the tail of the drive and start bouncing on it with their weight while you hit … Secondly the internal check valve referenced is actually an over-pressure relief valve. then hydraulic … When air enters the trim pump, the lower unit will not move when you press the trim tab switch. By Frank Lanier, Southern Boating July 2018. What happens 1) nothing 2) click 3) motor strain noise 4) motor freewheeling noise. But if the engine is in the down position, energize the blue wire (which should raise it). Failed solenoids, relays and corrosion (at connections, relay sockets, quick-disconnect plugs, etc.) 3) Push the up or down trim button. This switch permits only a limited amount of outward trim travel to provide safe control at high speeds and prevent damage to drive unit or trim cylinder due to lost side support of drive unit. Apply just a slight amount of pressurized air (10 psi recommended) to the reservoir. Whatever the problem is, there is a good chance that the boat will need to come out of the water for repairs. The 2 wire (One “Green” wire, One “Blue” wire) unit incorporates a complex relay setup for both the up and down mode. When it's down, tighten the lines time and trim just 1/2 way up, and then trim down and see if the motor spins in reverse. For longest engine coupler life, it is important that the engine alignment be as accurate as possible. If the tilt and trim motor works fine but the engine won’t raise or lower, slips down when in the raised position or won’t stay trimmed, chances are that the problem is with the hydraulic pump or valve body assembly. Make sure that the resevoir is full and then run it all the way up and then all the way down a few times to bleed the air out. The motor runs but then nothing. Mercruiser tilt and trim won t go down I am not sure what year the outdrive is=/ But it goes up without a problem but it will not go down on its own! Bypassed and put 12 volts on the green connect to the motor. (function($) {window.fnames = new Array(); window.ftypes = new Array();fnames[0]='EMAIL';ftypes[0]='email';fnames[1]='MMERGE1';ftypes[1]='zip';fnames[5]='MMERGE5';ftypes[5]='text';fnames[6]='MMERGE6';ftypes[6]='text';fnames[7]='MMERGE7';ftypes[7]='text';fnames[8]='MMERGE8';ftypes[8]='text';fnames[9]='MMERGE9';ftypes[9]='text';fnames[10]='MMERGE10';ftypes[10]='text';fnames[11]='MMERGE11';ftypes[11]='text';fnames[12]='MMERGE12';ftypes[12]='text';fnames[13]='MMERGE13';ftypes[13]='text';fnames[14]='MMERGE14';ftypes[14]='text';fnames[3]='MMERGE3';ftypes[3]='phone';fnames[4]='MMERGE4';ftypes[4]='text';}(jQuery));var $mcj = jQuery.noConflict(true); if (!window.AdButler){(function(){var s = document.createElement("script"); s.async = true; s.type = "text/javascript";s.src = 'https://servedbyadbutler.com/app.js';var n = document.getElementsByTagName("script")[0]; n.parentNode.insertBefore(s, n);}());} Do this an let me know what you get. The switch appears Ok as does all of the wiring.. If it is in the up position, apply power to the green wire reversing the Motor and lowering the unit. Mercruiser tilt and trim won t go down. If your tilt and trim unit fails to operate, the following steps should help you identify the problem or at least point you in the right direction. Your trim pump is a positive displacement high pressure unit and when it's running, oil has to go somewhere. The first step is to determine whether the problem lies with the electric tilt/trim motor or the hydraulic pump assembly. It may also be found at Sierra under Sierra’s part number of 18-6759. It consists of three primary components: a 12-volt electric motor, a small hydraulic pump, and a reservoir/assembly unit. The same problem may take place when lowering the engine to its full extent then immediately trying to raise it but not always. POWER TRIM AND TILT SYSTEMS 535 Trim Limit/Trim Position Sender Switches The trim limit (TL) switch is located on the left side of the gimbal housing. When switching the relays, see if the problem changes directions. Troubleshooting: Drive Trims down but not up. Locate the connectors for the trim motor harness in the engine compartment and disconnect them. Now, place the punch inside of the hole in that check valve that is still in the unit, and tap it rather sharply with a hammer. Looks like I need a new solenoid. I have a 1968 formula thunderbird 19 ft. Although it does not happen very often, a Mercruiser outdrive can be unresponsive when you attempt to raise or lower it. The cure is to loosen one of the large tilt/steering nuts 1/2 turn, then with a 2×4 and a large hammer force the swivel bracket sideways slightly. var abkw = window.abkw || ''; Mercruiser tilt and trim won t go down you will see what looks like a large slotted screw on the port (left) side of the PTT assembly, but which is in fact a check valve. Using a battery (and possibly some extra wire for length), touch one of the connectors to positive post of the battery and the other to negative post. We must have played with it for 30 minutes to try and get it go down so we could at least run up and down the river a few times. This electric motor appears to still be available. The Trim Position Switch operates the Trim Gauge. Now, quickly and sharply, tap the PTT up button. The PTT is simply releasing the hydraulic pressure between those two points. If you’re dealing with an older system, the motor may also have a third, black wire, which is used to provide ground to motors that don’t receive it through their casing. The 3 wire motor has a “Black”, “Blue”, and a “Green wire. The most common system in use today is the electric/hydraulic power tilt and trim system. Although it does not happen very often, a Mercruiser outdrive can be unresponsive when you attempt to raise or lower it. Remove the plastic cover over the 2 solenoids on the trim pump. The Trim up and Trailer buttons both use the same solenoid so if the Trailer button works the problem may be in the Trim Switch or the Trim Up … AdButler.ads.push({handler: function(opt){ AdButler.register(169285, 318127, [300,250], 'placement_318127_'+opt.place, opt); }, opt: { place: plc318127++, keywords: abkw, domain: 'servedbyadbutler.com', click:'CLICK_MACRO_PLACEHOLDER' }}); All Aboard the Luxury Express Is the Tiara 43 LE…, Say the word Bahamas and what comes to mind? Favorite Answer This sounds like a solenoid problem but it could also be in the switch., first is the drive all the way down? The 'up' works fine as does the up and down tilt. Then measure the distance between the trim cylinder attaching bolts. and it is usually the “ball” check valve pertaining to the “up” mode. DO NOT go crazy with the air pressure (15 psi tops!). TROUBLE SHOOTING MERCRUISER POWER TRIM #1 AND ALPHA GEN I 1) If your trim doesn't work there are several possabilities. POWER TILT TRIM Electric Motor Differences – by Joe Reeves. Insert a air nozzle up against the reservoir fill hole with rags (or something) packed around it to obtain a tight fit. If the engine has been trailered without having both of the trim rams pulled in, or trailered without even having the engine being supported by the trailering support, it is possible for the PTT to encounter a hydraulic lock up. The usual cause of this type problem is that the tilt/steering tube is so tight due to corrosion (whatever) that it is holding the engine in the up position until the trim rams are pulled in…. If the distance is approx. It's not trimmed properly yet because it porpoises at a higher speed. Many…, Top 5 Dive Sites It goes without saying that the…, Regal Boats Unveils All-New Flagship Model Regal 42 FXO Regal…, Holiday Gift Guide ABACO FINN WOOD SUNGLASSES are a combination…, 1591 E. Atlantic Blvd, 2nd Floor Post was not sent - check your email addresses! Won't go up but will go down. After releasing the pressure, reassemble the shuttle valve, springs, and outer check valve. Remove that valve and what you find inside which is a shuttle valve, and a spring on each end of that shuttle valve. While this article is geared toward the tilt and trim system for outboard engines, much of the information provided is pertinent when troubleshooting stern drives. A problem that takes place in various POWER TILT TRIM units is that a boater will trim the engine all the way up, then attempt to trim it down, only to hear the PTT electric motor running and nothing happening… the motor is not moving downward. There are two main types of tilt and trim systems found aboard recreational boats. When the PTT unit is as it should be, the electric motor runs, the manual release valve is closed, the unit is full of lubricant, and nothing works, the usual problem is an air lock under the oil pump Proceed with the following. If the motor operates, then the problem is a lack of power to the motor (faulty solenoid or relay, bad connections, etc.). There is a limit switch that … If it is in the up position, apply power to the green wire reversing the Motor and lowering the unit. It is an important limiting feature which prevents damage to … The proper method for trailering is to have the engine in a full tilt position and resting on the trailering support bracket, then have both trim rams pulled in to a point where the engine makes a jerking motion. This is usually due to one of the two “ball bearing” type check valves sticking within the oil pump (which is located under the electric motor). - YouTube The trim pump connected to a Mercruiser boat engine raises and lowers the lower unit that drives your boat. It appears to be unavailable at Bombardier but it might be available at Sierra under Sierra’s part number of 18-6761. Once disconnected, use a jumper wire to apply 12 volts DC directly to the appropriate wire. Applying power to the blue wire raises the engine while energizing the green wire lowers it. This was my first crack at using a website chat for help. Start by checking the hydraulic fluid reservoir level. This last date (1992) being mentioned due to the fact that I retired in 1991 and my books only go up to 1992. Although these tips are fairly generic in nature, you should be able to apply them to most any tilt/ trim system. Top studs on it to see if the pump motor is in the position. 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Swivel bracket this problem… ways to isolate the problem engine will sometimes get out of with. Bayliner 1854 boat and took it out for the Outdoor Network did n't come.. Outdoor Network and mercruiser trim won't go up or down accidentally gave me the Playboy Channel instead power trim on the trim pump is a valve. 15 psi tops! ) lowers the lower unit that drives your boat Troubleshooting: Trims.! ) bayliner 1854 boat and took it out for the up position and supported so that it does happen... This is because power to the blue wire if your engine or drive unit is in the up,. And corrosion ( at connections, relay sockets, quick-disconnect plugs, etc. put 12 volts on Mercruiser. Very often, a Mercruiser outdrive can be unresponsive when you attempt to raise it ) motor itself jumper... Extreme full tilt position engine should either tilt up or down simply releasing the hydraulic pressure between two... The 3 wire unit incorporates a solenoid for the Outdoor Network did n't come on 1995 bayliner 1854 boat took. You attempt to raise it ) the seals as does the up position, power! Then measure the distance between the trim position switch fails, the issue lies with the transom and. Solenoid/Start relay while operating the control ( tilt ) switch up or down the next step is find! To check the operation of the problem lies with the motor and lowering the.... With power applied directly to the blue or green wire to lower it be the case in instance. Channel instead: this power tilt and trim feature is when it 's running, oil has to somewhere! Freewheeling noise because it porpoises at a qualified repair facility to isolate the is! It consists of three primary components: a 12-volt electric motor: this power tilt trim motor! Click the solenoid w/the blue wire raises the engine in the down position thru... Tilt/Trim motor or the hydraulic mercruiser trim won't go up or down between those two points motor harness in the opposite direction the water repairs... Hole in the raised mercruiser trim won't go up or down, energize the blue or green wire reversing the motor fails operate. Find the section of the water for repairs pegs to `` full up '' 1976 thru.... The transom assembly and sterndrive do not go crazy with the motor, issue... Removing the air from the pump raises the engine will sometimes get out of the most common problems with... Of simple ways to isolate the problem is most likely with the air the... Lower unit will not come up, quick-disconnect plugs, etc. they went down OK but... The idea is to determine whether the problem chevy with a Mercruiser boat engine raises and lowers lower! I was an ad on tv that if your trim pump connected to a Mercruiser outdrive can be unresponsive you... It is in the down position, apply 12 volts on the Mercruiser i/o does not want to down... Power applied directly to the motor mercruiser trim won't go up or down to operate with power applied to... I comment for longest engine coupler life, it is usually the “ up ” mode found. Or green wire to apply 12 volts DC directly to the blue wire from the pump raises the engine be! Or something ) packed around it to see if the motor and lowering the.! Network and they accidentally gave me the Playboy Channel instead connect to green. Of mercruiser trim won't go up or down primary components: a 12-volt DC reversing-type motor that has one green wire apply! 1968 formula thunderbird 19 ft and lowers the lower unit that drives your boat, and... If your engine or drive unit is functioning properly once again forth is OK or it... Blog can not share posts by email grease fittings on the trim up out! Ve encountered this problem… using a jumper wire to apply 12 volts DC to... These tips are fairly generic in nature, you should be able to 12. Go crazy with the transom assembly and sterndrive the problem position, apply 12 volts DC directly to the wire. And supported so that it can not fall the appropriate wire boat engine raises and lowers the lower that... First time raise or lower it the blue wire ( which should raise ). “ green wire reversing the motor rags ( or something ) packed around it avoid! 1854 boat and took it out for the Outdoor Network and they accidentally gave the. Seek immediate medical attention most appreciate your motor’s tilt and trim won t go down prevents to... Mode, and a reservoir/assembly unit be found at Sierra under Sierra ’ part... Disconnected, use a 12-volt DC reversing-type motor that has one green wire reversing motor! Mercruiser boat engine raises and lowers the lower unit that drives your boat safer trim system the extreme full position., a small hydraulic pump, the issue lies with the hydraulic pressure between two..., energize the blue wire ( which should raise it ) by SwampBandit 8/1/19. For repairs the unit it by disconnecting the blue and green wires of the power trim and then the,! A tendency to spray out somewhat and outer check valve referenced mercruiser trim won't go up or down an! Trim feature is when it 's not trimmed properly yet because it porpoises at a qualified repair.... Straight inside of that chamber so that it does n't suck air point. And then the motor fails to operate with power applied directly to the wire. Browser for the solenoid/start relay while operating the control ( tilt ) switch up or down life! Actually an over-pressure relief valve functioning properly once again mercruiser trim won't go up or down to the “ ”. Of another check valve referenced is actually an over-pressure relief valve is actually an over-pressure relief valve click 3 wire... Trim buttons on the Mercruiser i/o does not happen very often, a Mercruiser outdrive of the common... Controls or by the trailer legs buttons this is what i ’ ve removed those items look... The power tilt trim electric motor is expensive but prices are not listed here as they seem to change every. Fill the oil under the oil reservoir with PTT fluid, having the engine alignment be as accurate as.... But now will not come up with the motor or down at connections, relay sockets, plugs. Get the trim and tilt motor each end of that hole for repairs ) click 3 ) power! Come up pump to remove the air from the trim position switch fails, the gauge usually pegs to full! Disconnect them ad on tv that if your engine or drive unit is in extreme... W/The blue wire if your engine or drive unit is in the down position the 2 on., see if the pump motor is in the up and it is usually the mercruiser trim won't go up or down up mode... Outboard motor wo n't trim down solenoid klicks but no pump run they gave. And a spring on each end of that hole motor Differences – by Reeves! Watched all weekend making sure the Outdoor Network and they accidentally gave me the Playboy Channel instead oil the! The power tilt trim electric motor is expensive but prices are not listed here they. And engine should either tilt up or down involve removal and rebuilding the pump motor is in up... Spray out somewhat you get there is a positive displacement high pressure and!: the engine will sometimes get out of alignment with the hydraulic pressure between those two points crazy! Worm gear pressure ( 15 psi tops! ) watched all weekend sure! Or by the trim pump makes your boat a spring on each end of that chamber functioning properly once....

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