How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Jason Your Own Question

Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 9862
Experience:  Degree in Marine Technology. Gas and diesel marine mechanic.
44667847
Type Your Boat Question Here...
Jason is online now
A new question is answered every 9 seconds

Help, My 50HP outboard 4 stroke power trim keeps putting itself

Resolved Question:

Help, My 50HP outboard 4 stroke power trim keeps putting itself in the up position and I have replaced the relays and the switch on the control lever has been checked it is OK could this be a bad selinoid or the up/down switch on the motor itself? anyone know or do I have a short somewhere?
Submitted: 3 years ago.
Category: Boat
Expert:  Jason replied 3 years ago.

Hello, and welcome to Justanswer. My name is XXXXX XXXXX I will be helping you today. If you need clarification on something please post back here.

 

Does this happen only when the boat is running. Or when you just have it sitting there on the trailer unattended?

 

If the motor starts to trim up by iteself, how do you stop it? Does hitting the buttons work or do you have to disconnect the battery?

Customer: replied 3 years ago.
It goes in the up position unattended and I have to disconnect the battery to stop it
Expert:  Jason replied 3 years ago.

Gotcha,

 

Then you have a short circuit that is sending power down through the blue wire someplace. The trim pump uses 2 wires, a blue and a green. If you put power to blue, the motor goes up, power to green, and it goes down.

 

Shorts will either stand right out, or can be extremely extremely hard to find, and you can spend all day on it. But 9 times out of 10 where the problem is, is a bad switch in the remote control handle that is putting power to the blue wire. Or, in the remote control, where the trim wires run down through the handle.

 

What I would start with first is popping the handle off and inspecting the wires for the trim where they run into the handle, and and to the control box. It is usually right there in that point, where it leaves the handle and goes into the box that they chaffe and the red wire puts power to the blue wire.

There is a grommet in there that is supposed to keep that from happening, but the grommet likes to fall out over time.

 

I would start by looking for shorts in that area first.

Like I said before, its either going to be real easy to find, and the short is right were I said it would be. Or its not, and you can spend all day looking for it.

 

Post back with questions.
good luck!

Jason

 

 

If this answers your question please do not forget to hit accept. Hitting accept is the only way justanswer compensates me for helping you.
You can still come back here at any time and at no extra charge to ask follow up questions to this even after hitting accept.

Hitting accept does not close out the question.


If I have saved you considerable time/money, bonus tips and positive feedback at the end are always greatly appreciated. Thanks!

Customer: replied 3 years ago.

Have already checked the up down buttons on the throttle handle is it possible the swith in powertrim swith in the lower unit of the motor is shorting It is a 2008 motor but it did get wet with the top off could the water cause this

I know I am confusing so I will start again the up down switch in the throttle handle checks out the relays are fine apparently a selinoid would not be the answer and the Power trim motor works so it is getting stuck in the up position and continually runs until power supply is cut off. There is a second power trim up and down switch in the lower unit of the motor could this switch be bad or short circuiting from getting wet?

Expert:  Jason replied 3 years ago.

Thats the problem with shorts like this, they can be hard or easy to find. Normally its right there in the handle, where the wires run down through it. But it can also be anyplace at all on the motor. Every inch of wiring from the button on the throttle handle down to the motor itself needs to be gone through if you can't find the short easily.

 

Try this. Make sure the battery is on. You can leave the engine off. Go and jiggle the remote conrol handle, put the throttle into "throttle only mode", and swing it foward and back a few times, see if doing that makes the trim motor react in any way.

Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 9862
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
Jason and other Boat Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Dominick

    Marine Mechanic

    Satisfied Customers:

    1009
    25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
< Last | Next >
  • http://ww2.justanswer.com/uploads/dominickb/2008-12-14_204035_dominick.jpg Dominick's Avatar

    Dominick

    Marine Mechanic

    Satisfied Customers:

    1009
    25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    Rigger, Diagnostician

    Satisfied Customers:

    557
    40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness
  • http://ww2.justanswer.com/uploads/whitesmarine/2009-11-07_025719_07011.JPG John White's Avatar

    John White

    Marine Mechanic

    Satisfied Customers:

    306
    11 years experience working on outboards, inboards, sterndrives & pwcs
  • http://ww2.justanswer.com/uploads/OL/oldnewenglandmarine/2012-9-8_15014_icon.64x64.jpg Jason's Avatar

    Jason

    Marine Mechanic

    Satisfied Customers:

    7718
    Degree in Marine Technology. Gas and diesel marine mechanic.
  • http://ww2.justanswer.com/uploads/JA/jacksparrow1956/2011-1-16_191846_009.64x64.JPG Tan's Avatar

    Tan

    MerCruiser Certified Technician

    Satisfied Customers:

    7330
    39 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
  • http://ww2.justanswer.com/uploads/JE/JeffGr/2012-6-15_14217_20001003AA1.64x64.JPG Jeff G.'s Avatar

    Jeff G.

    Marine Mechanic

    Satisfied Customers:

    4172
    39 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance
  • http://ww2.justanswer.com/uploads/dkreines/2008-3-22_155128_daveja.jpg Captain Dave's Avatar

    Captain Dave

    Marine Mechanic

    Satisfied Customers:

    2672
    USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience