'92-150 with intermittent spark

Mike Langianese

Petty Officer 2nd Class
Joined
Aug 3, 2003
Messages
122
Twin 1992 Evenrude 150 HP, 6-cyl. 60° E150NXENC and E150EXEM Serial #’s <br />PORT ENG: G03014951, STBD: G03076183<br /><br /><br />Counter-rotating engine has intermittent spark. <br />Background (sorry for being wordy) <br />I am still trying to get these engines running correctly. :( Finally had someone remove all the garbage under the center console re-wire the electronics, new ignition switches and two new safety cut-offs.<br /><br />Both engines started fine in the driveway. Took boat to the lake, Counter-rotating engine cranked but would not start.<br />Back at the house found the housing of the neutral safety interlock switch was broken so we wired the circuit without the switch.<br /><br />No spark. Then engine started and ran fine and started several times, now no spark. Getting 12+V to the wires at the top of the powerpacs<br /><br />Several questions:<br />1. The test procedures in the manual calls for specialty testing equipment from OMC. Are substitutes available? <br />2. Is it prudent to remove parts from the running engine and put them on the problem child until the problem is solved? Or do I run the risk of damaging the “working” parts?<br />3. The wires at the regulator/Recitifier appear to have gotten hot, insulation melted together but still in tact. Would you guess that this is the problem? 18-5828 Regulator/Recitifier is $197 on IBoats. Shall I swap from the other engine to check, use the manual to trouble shoot the system (and buy test equipment) or a bad Regulator/Recitifier is mostly likely problem and buy a new one.<br />4. It was also suggested to me to remove the flywheel and check that the magnets are all firmly in place???<br /><br />Thanks for any input and help
 

clanton

Rear Admiral
Joined
Jul 9, 2001
Messages
4,876
Re: '92-150 with intermittent spark

No to all 4 questions. You need at least a meter thats reads peak voltage, or a meter thats reads about 300 volts AC. When using the AC meter X the reading by 1.414, Trents method. You should check stator charge coil, stator power coil, and pack output to ignition coil, at cranking rpms, idle, rpms and full throttle, loaded engine. Then check for ignition coil arcing to metal plate between the pack and ignition coils. Oem manual will give correct specs and wire colors.
 

Mike Langianese

Petty Officer 2nd Class
Joined
Aug 3, 2003
Messages
122
Re: '92-150 with intermittent spark

Thanks Clanton, (I would have fried the parts form the "good" engine).<br />I'll start studying trouble shooting in the manual and get back later
 

nitrobasser

Cadet
Joined
Jul 21, 2004
Messages
6
Re: '92-150 with intermittent spark

Mike - let me know what you find out on you intermittant engins - I have the same problem as related in another post.
 

Mike Langianese

Petty Officer 2nd Class
Joined
Aug 3, 2003
Messages
122
Re: '92-150 with intermittent spark

Nitrobasser,<br /><br />I have followed you post, and will keep you in the loop. :)
 

farginicehole

Chief Petty Officer
Joined
Apr 15, 2003
Messages
482
Re: '92-150 with intermittent spark

Crabby Mike,<br />Check stevensinstruments.com. They sell a lot of diagnostics tools for these engines, and I bought a PV-1 adapter that will allow me to use a "high quality digital multimeter" (I'm going to borrow a Fluke 87 from work) to get peak voltage readings. I'm told the "peak" button on even good multimeters are useless for doing the peak voltage output tests described in the manual. I am just beginning to learn about these engines, and am experiencing a no-spark condition on between one and three cylinders at any given time on my '89 150 XP. So far, I've replaced all six ignition coils, but as I expected, this didn't fix the problem. I'm hoping it's the power pack and not the stator (stator doesn't have any discoloration or dripping potting material), but want to be sure before I just start replacing everything.
 

nitrobasser

Cadet
Joined
Jul 21, 2004
Messages
6
Re: '92-150 with intermittent spark

Mike, <br /> Thanks - thisis very frustrating in that sometimes it works and some times it dosen't. IT fired up just fine on Tuesday and Wednesday, but to day no spark. Had it to a wrench once and it started fine. Gonna take it in to another wrench on MOnday and hope the problem remains. If it dosen't appear I'm goning to have him replace the stator and timing base and it the probelm comes back I'm going to replace the regulator and then the power pack. Up til now it's been a pretty reliable engine. oh Well.....
 

Mike Langianese

Petty Officer 2nd Class
Joined
Aug 3, 2003
Messages
122
Re: '92-150 with intermittent spark

Hi guys,<br /><br />Thanks for the stevens instruments site, I'll check it out. I agree about the fustration, I've had this boat since last winter and still dont have it in the water :( , one problem solved another crops up :D <br />This forum is a BIG help :) :) :)
 

farginicehole

Chief Petty Officer
Joined
Apr 15, 2003
Messages
482
Re: '92-150 with intermittent spark

Mine has always been kind of hard to start when I first get to the lake, especially a bear after it has sat for a few months (we have winters around these parts!), but it usually runs pretty good after being started once and always fires right back up after you've shut it down to fish or whatever. It only hits around 5000 rpm and I only get 40 mph top speed (18.5' Alumacraft walleye boat) with the stock(?) 15x17 aluminum prop though, and I'm pretty sure it's because it's dropping at least one cylinder at any given time due to no spark. When on muffs in the driveway, I completely lose spark on anywhere between one and three of the cylinders, and it doesn't even stay isolated to the same three cylinders. Hopefully, I'll get a chance to check the peak voltage this weekend sometime. I guess I need to make it more of a priority to get it fixed, as I'd like to get a properly-sized stainless prop once I get all six firing and get the rpms up.
 

Mike Langianese

Petty Officer 2nd Class
Joined
Aug 3, 2003
Messages
122
Re: '92-150 with intermittent spark

farginicehole2 said:
Check stevensinstruments.com. They sell a lot of diagnostics tools for these engines,
Please check the web address for Stevens, doesn't seem to work and a google didnt produce a useable result<br />thanks
 

farginicehole

Chief Petty Officer
Joined
Apr 15, 2003
Messages
482
Re: '92-150 with intermittent spark

Thanks. This page doesn't cover my engine, as mine is an '89 crossflow and not the optical ignition. I see they do sell OEM manuals, and I should probably get one of these to use instead of my Clymer.
 

clanton

Rear Admiral
Joined
Jul 9, 2001
Messages
4,876
Re: '92-150 with intermittent spark

If you enlarge the primer nipple on the carb about .010 this will inprove cold starting on the crossflow.
 

farginicehole

Chief Petty Officer
Joined
Apr 15, 2003
Messages
482
Re: '92-150 with intermittent spark

Thanks, Clanton. I'll have to take a look at those. Are they easy to remove? If so, I could bring them in to work and use some pin gages to see what the i.d. currently is, then drill them out 0.010 larger.
 
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