Guests - If You want access to member only forums on HSO. You will gain access only when you Sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

  • Announcements

    • Rick

      Members Only Fluid Forum View   08/08/2017

      Fluid forum view allows members only to get right to the meat of this community; the topics. You can toggle between your preferred forum view just below to the left on the main forum entrance. You will see three icons. Try them out and see what you prefer.   Fluid view allows you, if you are a signed up member, to see the newest topic posts in either all forums (select none or all) or in just your favorite forums (select the ones you want to see when you come to Fishing Minnesota). It keeps and in real time with respect to Topic posts and lets YOU SELECT YOUR FAVORITE FORUMS. It can make things fun and easy. This is especially true for less experienced visitors raised on social media. If you, as a members want more specific topics, you can even select a single forum to view. Let us take a look at fluid view in action. We will then break it down and explain how it works in more detail.   The video shows the topic list and the forum filter box. As you can see, it is easy to change the topic list by changing the selected forums. This view replaces the traditional list of categories and forums.   Of course, members only can change the view to better suit your way of browsing.   You will notice a “grid” option. We have moved the grid forum theme setting into the main forum settings. This makes it an option for members only to choose. This screenshot also shows the removal of the forum breadcrumb in fluid view mode. Fluid view remembers your last forum selection so you don’t lose your place when you go back to the listing. The benefit of this feature is easy to see. It removes a potential barrier of entry for members only. It puts the spotlight on topics themselves, and not the hierarchical forum structure. You as a member will enjoy viewing many forums at once and switching between them without leaving the page. We hope that fluid view, the new functionality is an asset that you enjoy .
Sign in to follow this  
Tom7227

I'm afraid I know the answer - but?

Recommended Posts

I have a 1984 90 hp 6 cyl Mariner outboard. I checked last night and there was no change in the voltage when I tested with the motor both on and off. Rectifier? Any idea what one would cost? Is it a do it yourself deal? Should I bother? I live on a lake and only use the boat there. It's not a big deal to re-charge the battery. In fact I have a solar panel on order to take care of that for me.

Thanks for any advice.

Tom

Share this post


Link to post
Share on other sites

You should have higher voltage with the motor running, but no more than around 14.5 What kind of change are you talking about Tom? Have you been having charging problems?

Share this post


Link to post
Share on other sites

The rectifier replacement isn't real difficult on your motor. Do you have a tachometer? Is that working? Usually rectifier and tachometer problems on mercs go hand in hand.

marine_man

Share this post


Link to post
Share on other sites

Tach hasn't worked since I got the rig 4 years ago. The voltmeter was 12.68 with the motor off and 12.65 with it running - and I figure I used up the .03 getting it started.

Share this post


Link to post
Share on other sites

Has it charged in the last 4 years?

Sure sounds like a rectifier or stator and rectifier.

You won't do any damage by not replacing it, but, as you already pointed out, you won't be charging the battery. So, on a longer trip you may want to have a spare battery with you in the boat, unless you like pull starting it with the little rope they give you.

marine_man

Share this post


Link to post
Share on other sites

Ya I see there must have been a typo. That motor should have 7-9 amps coming from the stator. If you cannot check the amperage, then a simple way, but not as accurate way, of checking the stator output is to use a good quality test light at the rectifier between the yellow leads still connected to the rectifier. If the light gets brighter as rpms increase, then the stator is producing some energy.

Rectifier testing and troubleshooting

CAUTION: Make sure the battery is disconnected prior to servicing.

Here are the steps:

Ensure all wires have been removed from rectifier and battery has been disconnected.

There are 3 terminals on the rectifier. There is one marked with "+" this will be "B", moving clock wise the next will be "A" the next "C"

1. Place/set your multimeter to the 1000 ohmmeter reading (RX1K, R X 1000, etc). See picture below.

2. Place the RED lead to the ground (G) and place the BLACK lead to A and C alternating. You should show continuity.

3. Place the BLACK lead to the ground (G) and place the RED lead to A and C alternating. You should NOT show continuity.

4. Place the BLACK lead to the terminal (B)) and place the RED lead to A and C alternating. You should show continuity.

5. Place the RED lead to the terminal (B)) and place the BLACK lead to A and C alternating. You should NOT show continuity.

6. If your results differ, then the rectifier should be replaced.

Share this post


Link to post
Share on other sites

are you sure about the 1 k ohm setting. Seems to me to test a rectifier you need to be on a diode testing mode which on most meters is 2K ohms.

Share this post


Link to post
Share on other sites

I suppose if you have a meter that has diode mode that would be the case. But all you are doing is checking continuity so a simple ohms tester will work just fine just by reversing the leads. I know with the 2 different testers I have, I test that way all the time.

Share this post


Link to post
Share on other sites

A diode will only pass voltage one way. The ohm meter uses DC voltage even on the ohms setting. That is why you only read resistance one way. By reversing the leads the diode will not allow voltage to flow so it shows infinite ohms. A meter that has a diode setting will use a voltage higher then .7 volts which is the voltage that must be overcome for a diode to turn on if it is silicon and .3 volts if it is germanium. Sorry to be a nerd here. but some meters will not work without a diode tester built in. I have a radio shack one that wont work and I have a fluke meter that will only work on the diode range. I have never tested a marine rectifier only diodes in electronic applications so maybe they are configured different.

Share this post


Link to post
Share on other sites

Nope, not being a nerd, I'm learning a few things. All I know is how to test 'em and so far it's been working. I have one digital that has 200, 2k, 20k, 200k, 2m, 20m. Then my DVA tester, the one Mercury Marine has endorsed and sold for years. has x1, x10, x100, x1k. Trust me Euro, I'm not trying to argue with you, you seem to know more about meters than I do. But thats the meter I've tested with for years on the 1k scale. But you have taught me a thing or two, thanks. Heck, maybe my meter has the diode mode built right in, and I don't even know it. blush

Share this post


Link to post
Share on other sites

Usually the meter has a picture of diode on it on the 2K range. If a meter has this it is dangerous to use on some circuits cause it can blow up some chips that are real sensitive. I have read your posts and FM is lucky to have you as a member. I can fix a radio but here on fishing minnesota it is much better to know how to fix a motor and a boat.

Share this post


Link to post
Share on other sites

Bruce,

My son came over with his fanch tester and followed your instructions and it is clear that the rectifier is kaput. I'm going to try and track one down and put it in and hopefully all will be working. There's even a chance that the tach will start to function.

Thank you for your help on this. I certainly wouldn't have been able to solve the problem without your taking the time to put those detailed instructions. I appreciate your effort.

Tom

Share this post


Link to post
Share on other sites

Glad I could help Tom. You shouldn't have too much trouble finding one. The Sierra # is 18-5707 (aftermarket). The merc number should be 816770T, but if you go that route, make sure to give the dealer the model and serial number.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  



  • Posts

    • sure looks like YHBB.  open fields and swamps close by? They like to hang out where the RWBB do.  Cannon SX30IS is pretty cheap online. 35 power zoom. good for still shots.   
    • Going to bait tomorrow with fryer grease, bread, dog food, cherry frosting, peanut butter, soft candies, raw white sugar, and popcorn. I am throwing everything at them tomorrow, hopefully the bears like the variety!
    • I don't know about that but I will certainly not write him off, if he can be a steady vet I will be happy. 
    • That's a great chicken recipe duff, but that steak n corn get my vote!! 
    • I was gonna say my yard has been thick with juvenile birds the last few days, always harder to ID birds this time of year. Had an albino something or other with a flock of birds, not sure I've seen an albino bird before. And just had a sharp shinned hawk hanging out on the branch above the feeders.  But I feed ALL of the birds......love them raptors. I will say the cowbirds around sure tolerate the dog or I getting pretty close to them.    
    • Had a decent trip.  We fished the evening of Aug. 9-Aug. 15.  Had 2 pretty good days, 2 bad days, and the rest were just so-so.  Dad, Uncle, and Grandpa don't like getting up early anymore so we usually outdrink the fish at night and sleep in mornings.   We have slowly been learning how to consistently catch fish on this lake.  The local guys don't provide any information and neither do the guys that have been making the trip for 20+ years.  Can't say I blame them much, but would have shortened the learning curve for us a little bit.  We found a bay a few years back that we can catch 10-16" walleye all day in, just a shallow weedy bay pulling spinners.  Usually get enough eyes' for dinner and then go search the reefs, shorelines, and islands for bigger fish.   I think we finally dialed in on some bottom bouncers and have 2-3 spots were we can go and most likely catch fish with the chance at some big ones.  1oz to 1-1/2oz BB with leeches or worms work the best on these spots.  2 spots are reefs topping out at 9-10fow and the other spot is a little flatter, with access to some shallow weeds.  We also deep troll suspended fish some evenings and don't catch a lot, but the ones we do are bigger fish.  We found iwe caught more fish when we were running and gunning.  Fish a spot for 20-30 minutes and then move on until we found some fish.  This kind of stinks for Grandpa but he understands we can't catch them if they are there and active. Biggest of the week was 26 1/4" walleye with 20-25 eyes' over 20".  I think I had 2 -25" and also a 37" pike the last evening.  Really fun time and scenery with the family.  Looking forward to next year and searching more of the lake.
    • Not a cowbird. We have several around here and they are generally dark-black grey and brown. The pictured bird almost looks as though it could be an immature yellow headed blackbird. Cowbirds are quite reclusive and we have been surprised they come out to our feeders, but they have become pretty regular customers. Like the deer that graze in the front yard. Last night we had the buck, doe and twin fawns and even though we talked softly to them they did not spook,  but seemed to simply acknowledge our presence on the deck and continued to feed. And of course, as usual, the black squirrels are gathering all MY walnuts!  darn.....I just can't win. The chipmunks eat my strawberries, deer eat tomato plants and squirrels eat my walnuts. I'm left with this old bottle of Beefeaters, a small bottle of vermouth and a few olives in a jar.  Things are tough out here in the wilderness.
    • Quincey should be a solid guy. I don't recall watching him play, but by looking at his stats over the years it appears to be an upgrade over Scandella.
  • Our Sponsors