Yamaha 8hp

[Swift_18]

Hi, <br /><br />I have a Yamaha 8hp fitted to my Swift 18 Sailboat. <br /><br />I have recently fitted new instruments and autopilot/GPS to the boat all running of a car battery.<br /><br />I don't have an onboard battery charger, so I have to remove and take the battery home to charge it.<br /><br />Mariner have a Saildrive outboard which has an output to be used for battery charging.<br /><br />Is it possible to modify my Yamaha 8hp so that I can use it to charge my battery?<br /><br />Looking forward to your replies and ideas.<br /><br />Nigel

 

[garyN]

Re: Yamaha 8hp

Nigel<br /><br />As far as I know you can put an alternator on this engine. They made it in electric start (even if you don't have it). Their is another way to do it with a rectifier? I think, but that output would be lower. <br /><br />if you have a dealer nearby, just call them. It will be several hundred dollars but worth it on a sail boat. These engines idle well enough to run at anchor and power your boat - put on a small inverter and you can make coffee, and run your laptop, etc. <br /><br />Gary

 

[31900]

Re: Yamaha 8hp

Have you thought of using a solar panel? Power free from the sun 365 days a year.

 

[rodbolt]

Re: Yamaha 8hp

the power output from that system below about 3500RPM is marginal and about 4 amps or so at 5000. for anything other than long runs it really wont charge a battery much less power an inverter long.

 

[garyN]

Re: Yamaha 8hp

Nigel<br /><br />You do need a good deep cycle battery, my 9.9 keeps it charged very well, and I don't run the inverter for more than about 20 minutes.<br /><br />It keep my 12 volt lights running for almost a whole day. <br /><br />Ps: thanks Rodbolt for explaing why I have <br />cooked" two batteries running the inverter for a couple of hours during the parage of lights, enginle is almost at idle the whole time.<br /><br /><br />Gary

 

[31900]

Re: Yamaha 8hp

The solar panel is still my best advice. I see sail boats with them on everywhere.