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Buying a Mercury 250Efi motor but it is a 30" shaft. Is there any way to change it to a 20" or 25" shaft?

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Yes there is but sad to inform you it will cost you a bunch as you have to buy drive shaft and lower housing then add in the time to exchange the gears seals prop water pump etc .shift linkage also needs to be purchased .even used the parts might run 1000.

Posted on May 03, 2015


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Posted on Jan 02, 2017


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Just rebuilt boat motor replaced crank pistons reeds and bored it 30 over decked the heads and after the break in process It will only run 55 at 5000rpm and before it ran 72 at 5800rpm whats wrong.

If you made no changes to the fuel injection computer to tell it that the displacement has changed from boring the cylinders 30 over, it will not know to add more fuel from the injectors. Engine displacement is programmed in at the factory.

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I would double check and make sure that it is not your wiper arms that is the issue. I have seen it before where the pivot hole, where the arm attaches to the transmission, will get worn and the pivot will just swivel in the hole.

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check the location of the cam position sensor. if they are in the same place ,then use all the sensors from the old motor

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Change c.v.boot

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Oct 27, 2011 | Cars & Trucks

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Air condition blower doesnt work in 2003 mercury grand marquis

Removal & Installation To Remove:
  1. Disengage the wire harness connectors from the retainer.
  2. Disconnect the blower motor electrical connector.
  3. Remove the hose.
  4. Remove the screws and remove the blower motor. CAUTION
    Clean any corrosion from the blower motor shaft before removing the fan.
  5. Remove the wheel from the blower motor.
To Install:
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  2. Place the blower motor in the housing and install the screws.
  3. Connect the hose to the blower motor.
  4. Connect the electrical connector.
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Jul 30, 2010 | 2003 Mercury Grand Marquis

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How do i change a blower motor in a 1999 mercury cougar

Blower Motor Removal
  1. Remove the footwell upper trim panel (passenger side).
    • Remove the pushpins.
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Your transmission needs repair. Since repairing transmission is not an easy job, ask first the service
center their repair cost, and compare it a new one.
If the repair cost is just 30 to 35% of buying a new one,
Then you may consider the repairing it. Otherwise, your
best option is buying a new one.

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2 Answers

My wipers stopped working, but when there are turned on, I can hear them working, but the blades themselves do not move.

The output shaft of the motor might be stripped or has loosened if an adjustable coupling. This may not be fun to access.
If you don't own one, I would recommend buying an aftermarket service manual from Haynes or Chilton.  These will often have step-by-step instructions for this kind of problem. They cost ~$20-$30 US and are available at auto parts stores.  

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