Yamaha outboard charging system

Login or Sign Up. Posts Latest Activity. Page of 1. Filtered by:. Previous template Next.

yamaha outboard charging system

Couple of questions, 1 Can I just go from this connector to a 12v battery? On another not is it possible to add electric start to the 15?

Make it easier for my kids to start it. Tags: None. Do you see a red lead with female bullet connector and a black lead with a ring terminal attached to the block? Can you take a photo of the two pin connector? Maybe he has a part number for a harness that connects to the connector at the front of your motor and which runs to the battery. Comment Post Cancel.

How to Troubleshoot a Yamaha 4-Stroke Outboard Motor

Sorry it has taken a while to respond. The regulator has two green wires coming from it, but there is also a red and a black, the black goes to the block, the Red is not connected. The two green wires go to the connector at the front of the engine. I am assuming the green is AC, can I remove them and put the red and black to the front connector?

yamaha outboard charging system

Attached Files photo 2. Originally posted by O2Addict View Post. Sorry for the delay, thanks!Like its new F15 and F20 siblings, the F25 has taken on signature portable advantages like an oil-retention system for leak-free, on-side storage capability, carry handles and resting pads.

The bed of your truck. The F25, F20 and F15 all feature a two-valve-per-cylinder, single-overhead-camshaft design that provides better breathing and more power. An optimally balanced crankshaft and labyrinth exhaust deliver smooth power, while Microcomputer Ignition adjusts timing to maintain maximum engine performance, economy and power under all conditions. An intake silencer and manifold on the F20 and F15 result in more direct airflow, for minimum noise and maximum power.

An acceleration pump on the F20 and F15 gives the engine the fuel it needs--when it needs it--like during rapid throttle advance. This ensures responsive acceleration. CDI Microcomputer Ignition monitors throttle position, engine speed and atmospheric conditions in order to precisely adjust ignition timing under all conditions for optimum ignition performance, ensuring smooth and reliable operation.

A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life. Incredible light weights, built-in resting pads and carry handles, an easy oil retention system and an optional folding tiller handle, allow for easy carrying and on-side storage without oil leakage or cowling scuffs.

Announcement

Our cc hp portable outboard sports a new, streamlined, portable design and class-leading power-to-weight. While its streamlined design is 25 percent lighter, it still packs exciting features like battery-less EFI. Pull-start models can now take advantage of this feature, plus the system is designed with an automatic decompression device to require even less effort for manual starting.

Our cc hp portable features a SOHC in-line, two-cylinder design. All Jet model weights include the jet pump assembly weight estimated. Owners Manuals. View the 25 hp. Efficient Power.

Efficient Power The F25, F20 and F15 all feature a two-valve-per-cylinder, single-overhead-camshaft design that provides better breathing and more power.

Optimum Performance. Optimum Performance An optimally balanced crankshaft and labyrinth exhaust deliver smooth power, while Microcomputer Ignition adjusts timing to maintain maximum engine performance, economy and power under all conditions. Streamlined Intake. Streamlined Intake An intake silencer and manifold on the F20 and F15 result in more direct airflow, for minimum noise and maximum power.

Responsive Acceleration. Responsive Acceleration An acceleration pump on the F20 and F15 gives the engine the fuel it needs--when it needs it--like during rapid throttle advance. Product Videos:.

Coil Test {would you look at that!]

Expand Gallery. Meet the Line-Up. Portable 25 hp Our cc hp portable outboard sports a new, streamlined, portable design and class-leading power-to-weight.

Switch Panels. Prop Selector.

yamaha outboard charging system

Show More. View Bulletins for all Models.Login to Your Account. Remember Me? Page 1 of 3 1 2 3 Last Jump to page: Results 1 to 15 of Thread Tools Show Printable Version. Yamaha Outboard Charging Circuit - Help needed. Hey guys, I have a F Yammy 4 stroke and have been doing some serious troubleshooting of late, trying to figure out some issues I've had starting the engine. I'm running 2 x Supercharge Allrounder 80Ah CCA batteries on an isolator and have recently had the startermotor refurbished with a new brush plate assembly and the commutator cleaned up nice and shiny.

I located a significant voltage drop over the original Yamaha high tension leads and replaced with new 4 gauge leads. The original Yamaha HTs had significant corrosion on the copper for over 2 foot from the end of the cable! Anyway, long story short the electrical system from engine to batteries has been completely rewired and the engine starts a treat with the batteries fully charged.

The issue is, I dont believe my engine is correctly charging the batteries. I drove the boat yesterday at wide open throttle for about 10 minutes and the volt meter on the Yammy gauges never got over My understanding is that the charge voltage should be regulated at between Any ideas on where to look at first?

yamaha outboard charging system

Any help would be much apprecated! Cheers, Trav. Re: Yamaha Outboard Charging Circuit - Help needed A wild stab based solely on my personal observation over the years is never trust original equipment volt meters, never sit on full throttle for that long but that is another subject and finally that it is best to check for the difference in charge V charging ie check the state of charge of the battery static then check the output once running all with a multimeter or trusted gauge because it has been checked for accuracy.

You can also partly flatten the batterys before the test as this will give a better indication of what charge the alternator is capable of providing. Hope someone can help more. Re: Yamaha Outboard Charging Circuit - Help needed Thanks FNQ, The 10 minutes may have been a bit of an exaggeration but I take your point I agree definitely on the accuracy of the original volt meters, however I was on the boat alone and I'm sure nobody would have liked to see me at the stern with a multimeter and nobody at the helm!

I have verified the voltage on the gauge previously using a DMM and it was pretty much spot on. As I actually used the boat as the "limo" for my sister and her husband to arrive at their wedding reception, I couldn't really take any chances with partially discharging the batteries beforehand! In fact I actually had 4 batteries on board just in case You realy need to know for sure, before you get any expectations.

Electrical System

The bro'inlaws 30HP merc pushes 15 amps, my 60HP everude pushes 12 amps, another member on here has a 75 everude that only pushes 8 amps. Have you baught the factory manual yet? I recon the best place to chek this is at home with the leg in a bucket Have you tried charging one battery only, at atime. If you have access to a DC clamp meter you could confirm the current going to the battery.

Its the details, those little details, that make the difference.Help Crappie. Forum Rules. Remember Me? Forum Main Crappie. Results 1 to 7 of 7. Thread: Yamaha 4 stroke hp. Yamaha 4 stroke hp.

I'm trying to diagnose if I have a charging system problem or a run of bad luck with batteries. I had one fail about 2 months ago it was a BP XPS brand and about 2 years oldso replaced it with new one, same model. This last weekend, after only 2 months, it failed also. AutoZone test said the battery was bad. I replaced it last night with an upgraded AGM battery. All I'm getting is Shouldn't I see a difference increase in voltage when the engine is running at a high rpm?

I know this question has been asked a million times but I didn't find it when I searched.

Upgrade Your Outboard Motor to Charge Your Battery

Any help is appreciated. It should charge up around volts at around rpm's. Any time the motor is running it is making voltage and if for what ever reason it looses contact with a battery, loose cables, green terminals, bad battery the rectifier will burn out and quit charging.

Need to start there and when repaired put the engine wires on the battery first then any other wires and throw the wing nuts awayget stainlees nuts with the nylon insert.

Tom "The reason I play Golf Yeah, those wing nuts are worthless. They don't even make good sinkers. Thread Starter. No wing nuts here. That was the first thing I did when I bought it several years ago. This evening after I started the motor, I disconnected it from the battery and it died.

A buddy said that is a sure sign of a bad alternator or charging system. He said that the alternator should provide enough juice to keep the motor running. Is that correct? I can't speak for some of the Yamaha's or Susuki's but the only outboard motor I have seen with an alternator is an optimax merc. I pulled the rectifier off today and ran a test on it and the stator.

Stator checked out good, but rectifier was bad. Anyone know what may have caused it to fail?Yamaha offers consumers great variety with its four-stroke outboard motor lineup.

In alone, the company featured 10 different four-stroke makes with dozens of different models. Each had unique engineering specs, power capabilities and intended uses.

But despite this great variety between different models, Yamaha's troubleshooting tips remain nearly identical for all of the company's four-stroke outboards. Yamaha includes troubleshooting tips and specific part requirements in the owner's manual for each of its outboard motors.

Use the Yamaha outboard's starter. If the starter motor doesn't engage and the engine doesn't turn over, the electrical system may be at fault. Check to see if the main fuse has blown on electric-starting models.

To access the fuse, unscrew and remove the electrical cover on the top of the outboard and remove the fuse holder with a pair of pliers. If the connection at the center of the fuse is broken, the fuse has blown. Replace it with one of the same amperage, as listed in the "Specifications" section of the Yamaha outboard owner's manual. Check the battery next. The battery should be located somewhere within the watercraft, separate from the Yamaha outboard in a secure and dry location.

Disconnect the negative black cable first and the positive red cable second. Remove the battery from its housing. Scrape away any corrosion from the battery terminals using a wire-bristle brush. Clean away debris or other buildup using a solution of one cup of water and one tablespoon of baking soda. Dry the terminals thoroughly with a clean rag before continuing. If the battery is damaged, replace it.

Reinstall the battery and battery cables, connecting the positive cable before the negative one. Try the outboard's starter again.

If the starter motor still will not engage, have the electrical system inspected by a Yamaha-certified mechanic. Check the fuel system first if the engine has problems starting or running. Ensure that there are adequate fuel levels in the gas tank.Because boats constantly operate on or are near water, electrical system care is even more important, especially in highly corrosive saltwater environments.

Make sure your electrical system is always ready to perform with these simple checks and procedures. The goal is to have as much voltage or electrical energy arrive at Point B as left Point A. As electricity passes through a device, some parasitic loss is normal. Either can wreck the good times, but with simple visual inspections and physical actions these scenarios can usually be avoided.

Some electrical corrosion can be easy to see, such as corrosion on battery posts or electrical panel connections. You can use an ohmmeter to check electrical connections and wires for excessive resistance. There should be no more than 0. Any more than that and you should investigate further. Any auto parts store can do this for you, or you can do it yourself with the right equipment. Caution: Make sure that there are no fuel fumes present when making, breaking, or checking battery connections and condition.

If in an enclosed area, run the blower or thoroughly air out the space, or take the battery outside to test it. Please plan and protect accordingly. All battery cable connections must be clean, tight and use hex nuts and lock washers not old- fashioned wing nuts. To avoid any doubt, always remove the terminal connection and clean both sides of the connecting materials down to bare, shiny metal, then re-install and tighten the connection properly.

Simply spray it on and watch for the foam to change color, indicating that the corrosion acid has been neutralized. It then dries into a thin, waxy film, preventing the build-up of additional corrosion. Corrosion often occurs where wires meet. Also, check any connections on gauges or add-on electrical equipment like battery switches, plotters, or fish-finders. Wiggle wires and connections to check for looseness. If either is found, disconnect and clean the connection with emery cloth or fine-grit sand paper, then re-install and tighten properly.

Not only will it help prevent corrosion, but it will help keep rubber parts like your cowling seal supple and able to do their job effectively. Tip: Do not spray silicone on any oxygen O2 sensors that your outboard may have.

Check the wiring and connections. Home Why Maintenance?Forums New posts Classifieds Gallery Search forums. Local Knowledge. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Yamaha 4 Stroke Charging question Need help! Thread starter??

Feb 27, 16, 5, Soul Cal www. I've got a little problem with my engine at the moment and which I am almost certain is something pretty minor, so I am looking for a little help in solving this. My engine is a Yamaha 4 stroke.

Below is a lowdown as to exactly what happened and where I am at right now. Ok, so at the end of November and during the Halibut tournament, I ended up getting towed in, due to what I believed was a charging issue.

I haven't been able to mess with it since that day due to things going on, but I really need to get back on the water soon, so I'm hoping to get this problem figured out and then fixed fairly soon. Here is what happened the day I was towed in One day before the tournament I discovered my battery was toast and went out and bought a new one and installed it and then cranked the boat over and all was or seemed to be good. The next morning I was at the ramp at about 3am and launched with my buddy and we went and loaded up on bait, and then I docked the boat while leaving it running and checking in all the teams for the tourny.

I turned off the sounder and continued with making my move, and tried turning the sounder back on again, but still got the same results, so I shut the sounder back off. As we were moving forward the boat was never shut offmy boat then bogged down and lurched As we kept going, the boat seemed fine, but then after another 2 to 3 minutes it bogged down again and then quickly went back to normal. And then in another minute it just shut down completely and I lost ALL power. Turn the key and nothing At that point I put it all together and realized why my sounder was acting up, and figured it was a electrical issue and my power was getting so low that it started to effect the sounder.

My power was so low, that I could not even transmit a call on the VHF, so it was at that point that I figured my charging system probably had not been working from the time I launched, and it eventually drained to a point so low that all or most power was cut down to nearly nothing and shutting down the boat.

Ok, so that's where I am at. I have done a little research and read that there are only two parts to my charging system So I went a step further and read that my battery at rest should measure around So here is my dilemma. After checking my battery today which has a fresh charge with my Yamaha gauges, it shows my battery at When I turn the engine on, it shows I was pretty sure my problem was going to be my charging system not working, due to all the symptoms it showed, as I even used a battery pack to retrieve my boat from where it was towed and docked the day after I was towed in, and the battery pack worked perfect I thought for sure I would be buying a new rectifier, but now after checking the voltage I am stumped for the moment.

I am going to keep reading up on this, but hoping one of you guys might have some hints or have gone through this issue as well. Any helpful feedback is greatly appreciated!! Thanks in advance!!


thoughts on “Yamaha outboard charging system

Leave a Reply

Your email address will not be published. Required fields are marked *