1987 200hp Evinrude Stator/Rectifier Issues

[j_k_bisson]

Hello New here but have probably a very asked question. Is it normal to be replacing the stator and rectifier on a 1987 200hp Evinrude? Is this like a 10 year maintence item?

My motor's stator has all the black stuff leaked out of it. I have heard this is due to a bad rectifier. Should I replace the rectifier along with both power packs as well. This motor is new to me, but I am going through it with the intention of gettting a couple of years out of it. Can't afford 12g's for a new motor. This one has 95psi on all cylinders, which seams standard for these motors. Pealed the heads of and not scoring on cylinder walls. The lower unit has vow back lash 5" or less.

So my question is Should I just go and replace all electrical (stator, rectifier, and both power packs for piece of mind. I do not want to have to replace this stator in a year or tow due to is melting again. Something made it melt I would like to understand what make them do it.

Jeff

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

JK...... Simply replace the stator. That engine has a 35 ampere stator that really runs hot. After running the engine for say a half hour, you may have noticed that laying your hands on the flywheel, then removing your hands.... the skin is still on the flywheel.... HOT!

Unfortunately that's the nature of the beast as the saying goes. In time, those two black coils located at the rear of the stator overheat and start to melt down. The tell tale sign is usually good spark when the engine is cold but weak erratic ignition when the engine runs awhile.

Very unlikely that anything else is faulty and I'd recommend holding off throwing expensive parts at it unnecessarily. If your tachometer operates properly and the battery charges, consider the water cooled voltage regulator/rectifier to be functioning normally.

If you have spark on all six cylinders after replacing the stator, the powerpack(s) are as good as they're going to get.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1

 

[j_k_bisson]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Took off the flywheel today and noticed that the magnets are chipped a bit on the leading edges. One is severly chipped. I will post a pick tomorrow. My question is this normal? Or should the magnet inside the flywheel be no chipped?

Also a question about the stator melting. Does the 150's and EP's have this same issue. The reasom I ask is they have two vents on both sides of the hood to allow more cross flow of air. I need to paint/redo my hood. So I look for a different one that has vent that will fit. If I do will the vent on the sides affect my carb jetting size?

Jeff

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Unfortunately you could run the engine without the hood.... in time the stator will still melt down. However it's not something that's going to take place every six months or so, it takes a few years.

Flywheel magnets chipped? I've never encountered that. I know that they do come loose and slide together and I have seen some broken due to being loose. They should be spaced apart about 3/8". If they are loose and need epoxying back in, use short pieces of 3/8" fuel hose to space the magnets.

 

[j_k_bisson]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Every few years? If you had to guess, what would the duty cycle be if used every weekend (both days) for the summer. Say 300 hrs/year. I troll with a different motor.

Also I notice metal "flash" in the hole leading to the magnerts in the fly wheel. Should I clean these up to allow more/better air flow through them? Or is this flywheel balanced?

Jeff

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

I have no idea of the duty cycle... there's just quite a space of time between melt down problems.

Metal flash shouldn't create a problem unless it's severe but if you can clean it up easily, you might as well as long as the flywheel's off. That won't affect the flywheel balance.

You betcha that flywheel is balanced. Make sure the magnets aren't loose and are spaced properly.

 

[j_k_bisson]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Just wondering.Do I really need to purchase the carb kits. Can't I just disassemble them clean/blow them out and reassemble. Or is there gaskets that tear when dissassebling?

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Carb kits..... You won't really know if you need them or not until you dismantle one of them. I replace the items if for no other reason to eliminate any possible double work. However, give it a try.... you may be one of the lucky ones.

 

[j_k_bisson]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

The I'll buy them, I can always return them if I have to.

Another question for you sir, what size of propeller should I use for this. The application is as follows.

1991 Bayliner Trophy 2002 2840lbs
1987 200hp evinrude 455lbs
1981 10hp Honda 76lbs
4 People 600lbs
Gas 82 gallons 516lbs
Fishing gear 200lbs
-----------------------------------
Total Weight 4687lbs

The propellers from Rvinrude are as follows

14.5" x 19p through 28p

Don't really know much about this propeller pitch stuff. And have limited funds.

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Sorry, I was never a prop guy. My speciality was engines..... matching a prop to a boat always came under the heading of rigging. I'll leave the answer to that question to another member.

 

[j_k_bisson]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Sound good to me then. I'll repost the question as a different thread.



Here is a pic of my flywheel magnets. If you look closely at the top magnet you will see it severly chipped. Should this be fixed? Or a new flywheel.

Here is the other side's magnets.



Jeff

 

[Joe Reeves]

Re: 1987 200hp Evinrude Stator/Rectifier Issues

Magnets can be replaced. No need to purchase an expensive flywheel. However, I wouldn't be concerned about that small chip. The spacing looks good so apparently none of the magnets are loose. If you see any hairline cracks that might be worrisome to you, press some epoxy in there.