1972 6HP evinrude has no spark

MK522fins

Cadet
Joined
Feb 8, 2012
Messages
19
Hi i am new to this, i have a 1972 6 HP motor that has no spark, the guy i bought it from said it ran for a little bit but shut off and has had no spark since then.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1972 6HP evinrude has no spark

Get a model # off of it and post it. It should be on one of the stern brackets.
 

geoffwga1

Petty Officer 1st Class
Joined
Aug 8, 2010
Messages
398
Re: 1972 6HP evinrude has no spark

Ok,what is the model #? You should find it on the side of the clamp bracket or on a core plug on top of the power head.It should be a 6202 or 3 for 1972.
Sounds like you have a coil problem,I have two 6's and they both had the same problem when I got them.Coils are not very expensive,you can get them here at iboats.Make sure you check your plugs and high tension leads before lashing out money on coils though.
Geoffwga1
 

Stickler

Petty Officer 2nd Class
Joined
Feb 5, 2012
Messages
117
Re: 1972 6HP evinrude has no spark

hi there, i would start by pulling the fly wheel and check the state of your ignition system,usually youll find a cracked coil or worn out points, possibly even a capacitor,if everything looks ok ,doesnt matter, looks can be decieving. Check this site out ,good procedure and pictures to go with it for checking all these ignition components with an ohm meter, really simple, plus you get to know your new old motor better, hope this is helpful.(http://www.outboard-boat-motor-repair.com/Johnson/default.htm)
 

AlTn

Commander
Joined
Mar 9, 2010
Messages
2,813
Re: 1972 6HP evinrude has no spark

6702=1967 evinrude 6 hp.....marineengine.com has diagrams of your motor...google..Leeroy's Ramblings outboard motor repair and maintnance..6 hp....
 

cajuncook1

Chief Petty Officer
Joined
Sep 3, 2009
Messages
559
Re: 1972 6HP evinrude has no spark

Your going to need to inspect your point, condenser and coils. They are located under the flywheel. Hopefully all you need to do is clean and regap your points and you might be in business. Still check your coils and condensers and plug wires.


Here is how to pop your flywheel off and it gives you information about re-torquing you flywheel nut.

http://forums.iboats.com/showthread.php?t=294072


Here are two link to show you how to test your coils and condensers.

http://www.youtube.com/watch?v=KT8rk5QWgS0

http://www.youtube.com/watch?v=l6eSXYmENDY&feature=mfu_in_order&list=UL




How to replace your coils, points and condenser. Please take digital pictures as you go, so it will help you return everything back in the right order. Keep cheap zip lock bags available to put your parts in so you don't lose them. They are small.

If your coils are good, but your points and or condensers are bad, then you can certainly order a set of points and condenser here from iboats. Easy breezy.

Here is some information I put together for a guy on another forum, but the information should help you out just the same.


Here is a diagram of a generic OMC (Johnson/Evinrudle/Gale) ignition assembly. You will have to remove the coil designated for the top cylinder and put the oil wicker in. It should be already be coated with a very light oil. (not grease). The purpose of the oil wicker is to lightly lubricate the outside riding surface of the cam so the point shoes do not prematurely wear. If you look at the points they have little shoes that ride along the cam. Please make sure the (breaker)points cam is on the correct side or the ignition will be out of timing. It should have the word [highlight]top[/highlight] machine written on the side facing up.

Ignitionplateandoilwick.jpg


FYI: You can only set(gap) one set of points at a time. Put the flywheel nut back on(turn with a wrench or ratchet clockwise) to allow you turn the crankshaft. (Please remove both spark plugs to make it easier to turn the crankshaft and prevent accidental starting)

You gap the point to 0.020 when the point shoes is at the top(high point of the cam). It should have a mark along with the word top. Then you will turn clockwise to the next set of point 180 degrees and set those points the same way. You will notice that the point of the previous set will be closed and when you come around again they will open up. *** When they are open no current is allow through. This is how you set your timing with the points.***

When you go to set the point's gap. Very gently snug the anchor screw, then adjust the gap with adjusting screw and the feeler gauge until the feeler gauge is sliding through with slight resistance only. Then tighten the anchor screw. Repeat procedure with second set of points. Please make sure your hands are clean and the feeler gauge is clean, because oil on the points can foul them up and create resistance....poor or no no spark. ALways use a spark check to evaluate spark. It should jump minimum 1/4 inch. Blue sharp snappy spark.

Here is a picture of a spark check...Cheap $6

sparktesterpic.jpg



Here is a picture of how to tell which wire is going to the correct cylinder. Thanks to Garry for providing the picture on other post.


TopCyl.jpg



If your using the existing wires then cut about 1/4 inch of end going the coil, so you have clean un-oxidized copper contacting the spiking in the coil. Twist the end of the spark plug wire onto the coil spike. If you have replaced the wires, make sure they are 7mm copper metal core and not the automobile stuff.

***** Please make sure two things*****

1.) Make sure all the wires are tucked away under the flywheel and not rubbing up against the cam or crank, because with will eventually get damage and create a short, then no spark!!

2.) Make sure the coil heels (ends) are evenly lined up with the mounting boss.

Here are some pictures. (Compliments of JBJennings..nice fella)

wrongcoilmount.jpg


rightwaytomountcoil.jpg


Lining up the coil heel with the mounting boss prevent damage of the coils and the flywheel magnet, prevent rubbing as the flywheel turns.

[highlight]*** Make sure the throttle is advanced to that start position***[/highlight]


Here is another picture that Garry (thanks Garry!!) supplied on another post with some modification.

OMC_Stdwithwirecolors.jpg



Both diagrams, should answer your questions.
 

AlTn

Commander
Joined
Mar 9, 2010
Messages
2,813
Re: 1972 6HP evinrude has no spark

cajun..you've got it down pat with that page you post...from now on it's gonna be "Ask Cajun" for all first posts concerning the universal magneto...thanks for taking the time to put it together!
 

Tim Frank

Vice Admiral
Joined
Jul 29, 2008
Messages
5,351
Re: 1972 6HP evinrude has no spark

cajun..you've got it down pat with that page you post...from now on it's gonna be "Ask Cajun" for all first posts concerning the universal magneto...thanks for taking the time to put it together!

Great post by Cajun....I sent the mods a suggestion that it be added to the Top secret file....
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: 1972 6HP evinrude has no spark

Now available in the Top Secret File as: Universal Magneto Troubleshooting
 

AlTn

Commander
Joined
Mar 9, 2010
Messages
2,813
Re: 1972 6HP evinrude has no spark

Congrats, Cajun!....you da man, JB!!
 

cajuncook1

Chief Petty Officer
Joined
Sep 3, 2009
Messages
559
Re: 1972 6HP evinrude has no spark

Well.......WOW! Just passing on the love of old outboards!!! You guys are great!!
 

nwcove

Admiral
Joined
May 16, 2011
Messages
6,293
Re: 1972 6HP evinrude has no spark

congrats MK! ........and beware, old ob's tend to multiply.....next thing ya know you will have more! lol
 

MK522fins

Cadet
Joined
Feb 8, 2012
Messages
19
Re: 1972 6HP evinrude has no spark

ok we got the motor running and we noticed that there is no air cleaner on the carburetor
 

MK522fins

Cadet
Joined
Feb 8, 2012
Messages
19
Re: 1972 6HP evinrude has no spark

and was wondering if that the way it was suppose to be like.
 

nwcove

Admiral
Joined
May 16, 2011
Messages
6,293
Re: 1972 6HP evinrude has no spark

many ob's dont have silencers on the carb, but you can look up your motor on marineengine.com, and see every part the motor is built from.
 

kfa4303

Banned
Joined
Sep 17, 2010
Messages
6,094
Re: 1972 6HP evinrude has no spark

yup it's supposed to be like that. no dust/dirt on the water (hopefully), so no need for an air filter. Some models have an air "silencer" which is sort of like a muffler for the carb, but no filter as such.
 
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