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Mariner 40 hp outboard

No spark on one motor. Tried switching all electrical components with running motor. right down to the stator and fly-wheel. Still have no spark. What next?

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  • Expert
  • 456 Answers

Faulty kill switch faulty ign switch,how old is motor,is it electric start,isit ayamaha mariner or mercury mariner,if Yamaha disconnect white wire from cdi

Posted on Dec 31, 2013

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6ya6ya
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Posted on Jan 02, 2017

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muffteck
  • 202 Answers

SOURCE: 25 hp mariner outboard runs ok for 2klm then

does it have the old type timming advance (non adjustable) get it timming through the cd switch. if so could be this but o/b man should have ched this change your gas hose and pump bulb if you sure no electrical problems

Posted on Mar 16, 2011

alicantecoli
  • 22246 Answers

SOURCE: mercury outboard 3.5 motor stalls

not sure here as i normally answer car questions but if this engine is of the new generation and its all electronic then it has to be plugged in to locate the fault .My outboard was playing up like this with loss of power and the dealer wanted a small fortune to repair the pump which feed the fuel injection system so i took it apart and made a new valve for it out of a piece of fishing hook plastic wrapper and a bit of copper wire hook type thing i made and that was about 5 yrs ago and its still running fine

Posted on Apr 13, 2012

goldbill
  • 184 Answers

SOURCE: 1977 9.8 hp Mercury Outboard Motor Serrial # 4605112, it's an electric start with a short shaft

put it in forward gear. Drop the lower off by releasing the bolts and nuts holding it holding the lower on. (one is hiding under the back pick up screen)- some models had a plug in the back top of the exhaust/intermediate housing hiding an allen head bolt pointing down.

Once released, put a protector in a vise and clamp the lower to the bench.

2 screws or bolts will hold the water pump cover on. (the drive shaft runs thru it) Clean the carbon and rust off the drive shaft will allow the pump housing and impeller off the lower. Retrieve the funny looking key drive which runs the pump.

Inspect the shaft, the lower unit oil for water. and find all the pieces of the water pump impeller which may have gone places they shouldn't have.- including the outlet tube from the power head. Check this by putting a tube on the end and blowing- you should hear and feel the pressure in the exhaust and tell tale hole.

Now take the model number , the old pump parts to the marina for a replacement. Do a side by side comparison at the marina so you get the right stuff. Check the inside drive of the rubber impeller and see if they are exactly the same.

NOW- put the new wear plate / gaskets and drive key on, hold in place with grease. Slide the impeller on the key and spin the drive in both directions to be sure it has the impeller and will securely turn it.

Put grease in the cup of the pump housing to prevent dry start and help seat the impeller blades. Spin the shaft as you lower the housing in the pump so the blades all face in the right direction (clockwise). Screw in the bolts. Grease up the seal the watertube goes in and the spline end of the drive shaft.

Up the hole it all goes, now you only have to spline the shifter (it hasn't moved has it?) The drive shaft and the water tube all at the same time.

Check the shifter for correct position and bolt it down

Posted on Jul 29, 2012

rilaxson
  • 456 Answers

SOURCE: suzuki outboard motor dt 28 will not spark

Have you checked the kill switch,make sure all earths are grounded

Posted on Dec 03, 2013

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