Question about Boating

1 Answer

I have a mercury outboard 50hp engine that will not start

I have a mercury outboard 50hp engine that will not start. The starter engages the flywheel but the the flywheel does not move.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 5,537 Answers

If you are saying the Flywheel is locked or Frozen then I imagine the starter Bendix was found extended and jammed against the Flywheel.

If the motor ran when it was shut off last, then your rings and/or bearings rusted in place. You don't want to grab the prop to turn it because it will strip the Rubber hub.

I would take out all the spark plugs, tilt the engine up as close to level as you can get it and spray WD40 into the cylinders. If you did not have water connected to the engine the pump may have crumbled but if the engine did not turn at all the pump may still be good.

Give the WD some time to penetrate and crank the engine to see if it broke loose. If it did not, you may as well drop the lower unit and eliminate jammed gears with a second try at cranking the engine.

If still no luck, you might try to rig an Air fitting to the Sparkplug holes and hit each with about 80PSI and another squirt of WD. This will force the WD deeper and force the pistons down with no damage.

Still no luck, then its disassemble time. Good luck on this.

Posted on May 27, 2010

  • Gordon Richard MacLean Jul 22, 2014

    Leave Ignition In Off Position ,Pull The Kill Switch Lanyard Out.

  • Gordon Richard MacLean Jul 22, 2014

    Try Turning Fly wheet by hand If It Turns By Hand ,]

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Power trim on. Throttle will only raise the engine up not down, 50hp mercury outboard. Works manually on engine.


I recommend looking at swapping the solenoid. It's not that expensive to do. There is one for up and one for down. Sometimes you can bang on them with a screwdriver and it will work again and get unstuck, but still would replace even if you get it working. Cheap fix. Usually 3 wires.

Jul 12, 2017 | Mercury Boating

1 Answer

50hp Mercury outboard electrical schematic


Hey David,
Yo should find all the info you need here..this will be very very helpful...' Mercury Outboard Manuals by Seloc 1965 2014

Jun 07, 2017 | Mercury Boating

1 Answer

I have a 1986 mercury outboard motor, thunderbolt ignition, 50HP, 4 cylinder. Forward gear works great. Reverse gear works very slowly , moves boat very slow and weak. Appreciate any help.TY


there is no gear box as such in an outboard leg it is just a clutch dog that is slid from front to rear to engage the cogs attached to the prop shaft
the related gear forward or reverse is attached to the shaft with a drive pin or splines
you will have to pull the unit apart to find what section has failed as it appears that the cog on the shaft is slipping ( sheared pin or failed splines in cog)

Mar 28, 2017 | Mercury Boating

1 Answer

I need step by step procedures on how to check compression on a 2004 Mercury 50hp 4 stroke efi outboard motor


Go to a repair service and ask them to check it scanning the computer of your car.

Nov 08, 2015 | Boating

1 Answer

50hp blue band mercury .crack in plate port side leaking water


if its got about 18 bolts on it and aprox 12by6 inch in size then thats the exhaust plate !
remove all bolts and remove plate and then a s/steel plate , check for corrosion and damage etc ! clean all gasket faces and replace gaskets and put a light film of gasket glue on all areas where gaskets touch and refit !

Feb 28, 2015 | Boating

1 Answer

50hp blueband seized


make sure its not the gearbox ! drop the box and try the engine again ! ive had this b4 !! when you used it last there was plenty of power and cooling ? easy to strip if it is seized ! please let me know more !

Feb 18, 2014 | Seloc Mercury Outboard Engine Repair...

1 Answer

50hp mercury marine outboard


put a water pump kit in it

May 26, 2013 | Boating

1 Answer

Smoke coming out of bottom carb on mercury 50hp outboard engine


It's possible that a little fuel vapour come out of a carb on an hot engine that has just stopped.
Does the motor starts again and runs well in higher rpm ranges? Is the stall only when idling? If so, enrich the idle fuel mix ( screw out the idle mix screws half a turn t a time )

Aug 06, 2017 | Boating

1 Answer

Honda outboard engine 50hp nrepair manual


Here is a link to clymer manual. honda won't allow free manuals posted online. you will need to purchase. click here

Oct 25, 2009 | Boating

1 Answer

MERCURY OUTBOARD 50HP 1974 NO SPARK


Clean or replace and set points to .020. Also replace your condenser.

Mar 18, 2009 | Boating

Not finding what you are looking for?
Boating Logo

Related Topics:

596 people viewed this question

Ask a Question

Usually answered in minutes!

Top Boating Experts

Steve
Steve

Level 3 Expert

693 Answers

ray gallant

Level 3 Expert

45410 Answers

Fabrice Wolters

Level 2 Expert

320 Answers

Are you a Boating Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...