1981 Rude 90, wont go over 2k rpm under load....any ideas?

racerone

Supreme Mariner
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Dec 28, 2013
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The orange / blue stripe wire must find it's way to the top coil / top cylinder.---Same for both the #1 cylinder and the #2 cylinder.
 
Joined
Oct 22, 2007
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is that a broken orange wire in the bottom photo on the bottom coil

Sure looks like it. I was reading this post earlier while I was at work and for some reason (probably something to do with our wonderful IT department) I couldn't see the photos. That wire which appears to be just hanging there is screaming "FIX ME, FIX ME !!!!!" (either that or it's a heck of an optical illusion due to camera angle).
 
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Woodonglass

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Dec 29, 2009
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I KNOW nothing but...I did find this... thought it Might help if you want to trace the wires to ensure they are all going to the right places and hooked up correctly....
80_81_V4.jpg
 
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Corjen1

Lieutenant Junior Grade
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Aug 24, 2013
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1,237
is that a broken orange wire in the bottom photo on the bottom coil

Not a broken wire , but it is chaffed....

The orange / blue stripe wire must find it's way to the top coil / top cylinder.---Same for both the #1 cylinder and the #2 cylinder.

Racerone, I am tracking, now I think.....yes the orange and blue wires on both sides go to the top, and brown white wires go to the bottom on both sides.

I did switch,on the them on the left side, no help, same.



So here is the update: taking it one step further, I returned the connectors to their original position. Then swapped the power pack from side to side. Thought was, that if the power pack was bad on the left side, it should follow to the right side.

Hooked all back up, no change. Disconnect plug on eirther upper or lower, left bank = no change in idle. Disconnect plug on either upper or lower, Right bank = engine dies.

I put an extra spark plug in the disconnected plug on upper left side, grounded to block, = great spark, same thing on the lower plug, So much, I can draw the plug away for about half an inch before it stops sparking. So I Know there is good spark at the plug.... now Im really confused...... I did this on all 4 cylinders same result, great spark.

I did notice that on all 4 coils, when the plug got far enough away and stopped sparking, I would then get a spark going from the coil to a coil mounting bolt......

Any ideas here.....??? Thanks in advance!!!!
 

81_chapparel194

Petty Officer 1st Class
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Aug 7, 2012
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341
hey. remember me chiming in a while back?? same engine same problem... well I just got mine from the shop......bad stator wasn't firing one bank (2 cylinders) at random times.. replaced stator and WOW runs like brand new again.. bump the key and fires right up purrs like a sewing machine. but if your getting a spark jump from back of coil to the mounting bolt I had this problem a while back and ended up replacing that coil. no more spark jump but also didn't fix my problem... the new stator has definitely solved my problems (out of water anyway.. water test will tell the tale) remove your flywheel and pull the stator off and look for any cracks in the waxy resin coating.. I had SEVERAL and they were leaking melted goop from within the cracks,,, tell tale sign of bad stator without any tests. hope this helps you.
 

Corjen1

Lieutenant Junior Grade
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Aug 24, 2013
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1,237
Thank you All for the help, turned out to be the coils/spark plug wires. replaced them as an assembly, runs like a champ now.

 

Bosunsmate

Admiral
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Apr 7, 2012
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Glad its working, id be even more pleased if i saw him with a life jacket on, if the steering fails people can get flung out of a boat unconscious in an instance
 
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