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How do you fix trim tilt leaking oil on a 115 hp yamaha outboard. Shaft seems to have pit and leaks past it. Can seal be replaced while motor on boat. Is this difficult?How do you do this.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 86 Answers

SOURCE: I have a 1994 150 hp Yamaha outboard motor with

Stop! Dont replace the pump...I would bet that it is the "down" Solenoid that went haywire. I would begin by replacing the Down solenoid...it is a far easier and cheaper fix and if your pump works to raise the engine then that tells me that it is not faulty. The Down solenoid looks just like a starter solenoid and the one that you are looking to replace has a GREEN wire to it. Yellow with a red stripe is for the starter. Blue wire is the up solenoid. So replace the one with the green wire going to it and I bet it will fix your problem.

Posted on Aug 03, 2009

canbruce75
  • 1776 Answers

SOURCE: how to service a tilt/trim on a 50 hp yamaha

To check the fluid level, tilt the motor up and engage the tilt lock lever. Open the bolt on top of the tilt/trim reservoir. The fluid should be even with the bottom of the bolt hole. If not add some fluid. When you put the bolt back in, run the trim up and down a few times. That should purge any air out of the system. Always be on the lookout for any leaking hoses or fittings. Hope this helped and best wishes.

Posted on Aug 31, 2009

  • 1 Answer

SOURCE: Free wiring diagram for 1978 Mercury Outboard 115 HP boat motor

I have a maintainance manual for this engine (I have the same one) with pages of wiring diagrams. What specific system/area are you interested in, I could scan in the page(s) and email them to you.

Mark

Posted on Sep 20, 2009

  • 53 Answers

SOURCE: want to replace the trim/tilt motors on my 1995

no. a unmodified transom bracket may need to be moved not removed. Since the tilt motor is out you will need to manually lift the engine. you can see the picture diagram at www.yamaha-motor.com. click on outboard motors,parts and service, view parts catalog. find your year make and model by following steps listed at top. select power trim and tilt assembly. in the picture you will see the location of the Manuel release valve on the starboard side. turn the Manuel release valve then lift the engine. tie it up or use a stand to keep it up,do not use the tilt lock. with the engine in full tilt position, you can see the motor. some brackets are modified were you can remove the motor without moving the transom bracket. If unmodified you'll need to follow these steps. (1) lower the engine back down.the steering arm needs to be removed from the steering cable and swung forward. do not remove steering arm from engine. on the starboard side of the engine you will see the steering cable going into the steering cable tube. (2)a 1 1/6 nut secures the cable to that tube remove it and slide cable out do not remove it.(3) lift engine again and secure it. your about to remove the motor mount bolt so make sure you secure the motor completely (4)remove upper and lower transom to bracket bolts remove bolts on the port side only.(5) you will see three bolt that go through the transom bracket to the trim and tilt assembly. remove them.(6) if all bolts are removed you will be able to slide the port transom bracket to the left out of the way(7) remove tilt/trim motor.

Posted on Nov 03, 2009

  • 107 Answers

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Posted on Jul 21, 2010

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I have a 2003 yamaha 40 hp four stroke outboard, this year started up seemed to run great after about 25 minutes i shut it down an hour later checked oil crankcase full of water


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We have a 1998 yamaha v4 2 strock 115 engine. we can not get the motor to go down. even if we try to drop it manually


lock lever not down ? does it move up and down at all , the tilt tube could be siezed ,both trim solinoides working ? try standing on the engine gearbox as you trim down or manually release ! if then goes down try injecting the grease nipples with petrol via a grease gun that uses tubes like tooth paste and this will soak the corrosion ! then grease and see if free and if not enough then lift the engine off and remove the tilt tube and clean the sleeves and grease and refit !

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How to replace the mamuel relief value on a 90 hp yamaha out board motor


You have to remove starboard transom bracket,then remove circling from t/tilt release screw,remove screw,left hand thread.There is a flat washer that normally sticks to screw/valve,this needs to be replaced.Its easier to do this with motor trimmed up or if motor is off boat,lying on its side.Very little oil will come out if done in trimmed up position

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1 Answer

How to service a tilt/trim on a 50 hp yamaha outboard. I think the fluid is low as the trim will leak back down after raising the engine.


To check the fluid level, tilt the motor up and engage the tilt lock lever. Open the bolt on top of the tilt/trim reservoir. The fluid should be even with the bottom of the bolt hole. If not add some fluid. When you put the bolt back in, run the trim up and down a few times. That should purge any air out of the system. Always be on the lookout for any leaking hoses or fittings. Hope this helped and best wishes.

Aug 31, 2009 | Boating

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