No spark on starboard side of engine 1993 175 looper

H

heebeha

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I've got a 1993-95 evinrude 175 looper. I'm not getting spark on the STARBOARD side of the engine. I checked the stator, it's like new, wires are new, new powerpack, new plugs.

I read somewhere that the temperature sensor being bad could cause this. I need help also about the shift switch causing this.

Any advise would be greatly appreciated.

JD
 
H

heebeha

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Re: No spark on starboard side of engine 1993 175 looper

To clarify: I am not getting spark to any of the three wires on the starboard side, ( I earlier wrote that it was the port side, I always get them confused and yet I am a sailor with 15 years experience )

HELP please. The fish are biting, I need to get out there....
 
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ezeke

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Check the shift assist switch. It's located behind the shift lever on the engine.
 
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heebeha

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Re: No spark on starboard side of engine 1993 175 looper

ezeke said:
Check the shift assist switch. It's located behind the shift lever on the engine.
Click to expand...

How do I adjust it or test it? I was having issues getting power when going in reverse and was told to try adjusting the linkage. I turned the plastic wheel on the top linkage that is located forward on the engine at the bottom. Since I did that I had this issue. Is this where you adjust the shift switch? Any detailed help on this would be appreciated.
 
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ezeke

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

The switch has to be set in concert with any change in the position of the shift lever so that it will continue to shut off the three cylinders only as you shift out of forward gear.

You can disable the switch by disconnecting the ground wire but it will be much harder to get out of gear so be careful.
 
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heebeha

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Re: No spark on starboard side of engine 1993 175 looper

How do I adjust it to work in concert with the shift lever? I believ this is where I screwed up. I adjusted it out of sync.
 
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R1racer

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

heebeha said:
How do I adjust it to work in concert with the shift lever? I believ this is where I screwed up. I adjusted it out of sync.
Click to expand...


Had exact same trouble with my Rude 200 , What i did prior to start my Eng I disconnected the switch which is located behind and little under your shift / throttle linkage , follow right all the way u will notice it sets right on the top close to the power back ( it's only 2 wires one is solid black is ground and the other is the black with yellow) , Disconnect the one black/yellow you will gain all your RPMS /spark, Then while it's running go back and connect that switch you will notice you lose spark back on 3 cylinder ..It's designed to do so when you ready to shift so it want shift on high rpms and destroy your shift Dog

This switch sets in a plastic housing with loaded spring, Take it a part and clean the spring , I replaced the switch as when i connected it back it drooped my rpms which tells me the switch ( shift interruption switch ) is stuck at a time open, Some will say clean the switch and use it tell it fail I say why take a chance out on the sea ?.Hope that works for you keep us posted
 
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R1racer

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

there is no adjustment on it ...Due to the fact it's a spring loaded it' either open or close ..This mechanism will be activated and deactivated by the motion of your shift linkage All what u need to do is clean the spring or replace the switch if ohm test fail and go fishing
 
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heebeha

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Re: No spark on starboard side of engine 1993 175 looper

Ok so this must be the shift assist switch:
IMG_1757.JPG


I have three wires coming from it at the top. 2 yellow and black and one black that connects to a ground. I disconnectede both yellow/black wires but it did not make a difference, still no spark on the starboard side. I even removed the shift assist switch and stretched out the spring a little.

It has a new powerpack so I cant see it being the powerpack.


What is the logic behind this switch, when its depressed it triggers all cylinders or when its open?

Here is a photo of my wires leading to the powerpack. I put arrows where the wires are.
img4.jpg
 
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R1racer

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

That is the switch ....When switch is depressed activated it kills 3 cylinders = lowering your RPMS so you can engage your shift and then when it's open all 6 cylinders fires and full power restored this happen kinda momentarily

what rpms you are running ... Did you have this issue prior replacing the power pack , Or this happen right after replacing the power pack , Why did you replace the power pack..just trying to get the full pic
 
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heebeha

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Re: No spark on starboard side of engine 1993 175 looper

The guy who owned it before me replaced it, no idea why. It was running on 6 cylinders last week. If I pull the wires your saying it should fix this, temporarily? I did that and no change. Maybe I should just try it with the switch off the base plate so it's guaranteed to be open....

I'm stressed, I thought this was it for sure.

I'm getting a better spark tester now.
 
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Craig-

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

The shift switch is disabled by disconnecting it's ground wire. If the bank does not fire then, you have other problem. Double check connectors to power pack, pin may be loose, also check coil grounds.
 
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heebeha

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Thanks. I checked removed the yellow wires from the stator to the powerpack. Still no spark. Crap
 
Faztbullet

Faztbullet

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Unplug the blk/yellow connectors and remove plugs and retest( keeps from having to choke it to kill it) If you have spark diode in shift harness could be bad....
 
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R1racer

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Try swapping coils from the good firing bank to the other side, Unless something got loose coming off the power pack, check all your connection and make sure there is no short some where .

Also check the ground it's clean with no corrosion, You might have to do an ignition output test if non of the above works.
 
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heebeha

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

faztbullet said:
unplug the blk/yellow connectors and remove plugs and retest( keeps from having to choke it to kill it) if you have spark diode in shift harness could be bad....
Click to expand...

where is this diode in the shift harness?
 
Faztbullet

Faztbullet

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Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Around 1 inch below the "y" in harness,it will feel like a splice under the tape...
 
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heebeha

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Re: No spark on starboard side of engine 1993 175 looper

Thanks for the great read wilde1j. I am posting below what I extracted from the troubleshooting guide with my results so far. I hope it helps others and helps you all help me figure out this mess. Thanks for the continued support

NO SPARK OR INTERMITTENT SPARK ON ONE BANK:
iboats.com forum post: http://forums.iboats.com/showthread.php?p=2959568&posted=1#post2959568

1. Disconnect BOTH of the Black/Yellow stop wires AT THE POWER PACK and retest. If the engine's ignition has spark, the
stop circuit has a fault. Check the key switch, harness and shift switch.
NO EFFECT, STILL NO SPARK ON STARBOARD SIDE

2. Swap the stator wire pairs to the other bank and see if the problem moves. If it does, the stator is bad.
NOT SURE HOW I AM GOING OT DO THIS BUT ILL FIGURE IT OUT

3. Disconnect the Yellow wires from the stator to the rectifier and retest. If the engine sparks, replace the rectifier.
NO EFFECT, STILL NO SPARK ON STARBOARD SIDE

4. Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to spark properly. This can be
caused by a weak battery, dragging starter, bad battery cables or a mechanical problem inside the engine.
THEY ARE TWO NEW BATTERIES AND IT CRANKS FINE

5. Check the stator resistance and DVA output on BOTH banks (see Step #13 on NO SPARK ON ANY CYLINDER above).
Check the stator resistance and DVA voltage as given below for BOTH banks:
ILL DO THIS AFTER STEP 6, 2
img10.jpg

(*) This reading can be used to determine if a stator or pack has a problem. For instance, if you have no spark on any
cylinder and the stator?s DVA reading is out of spec ? disconnect the stator wires and recheck the DVA output. If the
reading is still out of spec ? the stator is bad. If the reading is now within spec ? the pack is bad.
(NOTE) Low readings on all checks indicate a possible problem with the flywheel magnets that require checking.
(SERVICE NOTE) It is recommended that liquid neoprene be applied to the areas where piercing probes were used.

6. Disconnect the 5-pin connector on the port side of the power pack and see if the spark returns. If it does spark, check
resistance to see if the Black/Yellow or Black/Orange wire is shorted to engine ground. Check to see if the Shift Interrupter
switch is located in the circuit where there is no spark.
NO EFFECT, STILL NO SPARK ON STARBOARD SIDE

Stator To Power Pack Connections
imgF.jpg

6 pin connector
a) Brown/Black
b) Orange/Black
c) Brown/Yellow
d) Brown
e) Orange
f) Brown/White

http://www.cdielectronics.com/downloads/troubleshooting guide/OMC 6 Cylinder Optical.pdf

7. Check the center hub triggering magnet in the flywheel. A loose magnet can cause this problem.
IN PERFECT CONDITION SEE IMAGES BELOW
8. Check the triggering and charge coil flywheel magnets for cracked, broken and loose magnets.
IN PERFECT CONDITION SEE IMAGES BELOW

imgB.jpg


imgA.jpg


img8.jpg

img9.jpg
 
H

heebeha

Petty Officer 2nd Class
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Messages
104
Re: No spark on port side of engine 1993 175 looper

Re: No spark on port side of engine 1993 175 looper

Faztbullet said:
Around 1 inch below the "y" in harness,it will feel like a splice under the tape...
Click to expand...

Im sorry, where is this "Y" you are referring to?
 
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