I have a Yamaha 9.9 HP 4 Stroke outboard motor. Do these motors have alternators on them? I am just wondering since I have no shore power or charger on my boat. -- Jeremy
Do outboards have alternators?
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Some do, some don't...
Do you have electic start? If so, most likely yes on alternator. If no elec start, doubtful on alternator.
Do you have electic start? If so, most likely yes on alternator. If no elec start, doubtful on alternator.
Yes....
It's an electric start. That's what had me wondering if it had an alternator or not. -- Jeremy
It's an electric start. That's what had me wondering if it had an alternator or not. -- Jeremy
7.5 HP Honda
My 7.5 HP 4 stroke Honda, pull start, mid-1980's vintage, has an alternator. Pretty amazing little machine, all in all.
My 7.5 HP 4 stroke Honda, pull start, mid-1980's vintage, has an alternator. Pretty amazing little machine, all in all.
google search result
hi joe.... I did a quick google search for yamaha outboards and chose this link to answere your question. Notice the **footnote on your model which suggests contacting a dealer to determine options. If you have an electric start I'm sure you have the alternator. Which is rated at 10 amps. Consult your local yellow pages or marine directory for Yamaha dealers in your area. I have a Tohatsu and was able to acquire a full service manual from the local dealer. http://www.yamaha-motor.com/outboard/products/subcatspecs/5/specs.aspx
hi joe.... I did a quick google search for yamaha outboards and chose this link to answere your question. Notice the **footnote on your model which suggests contacting a dealer to determine options. If you have an electric start I'm sure you have the alternator. Which is rated at 10 amps. Consult your local yellow pages or marine directory for Yamaha dealers in your area. I have a Tohatsu and was able to acquire a full service manual from the local dealer. http://www.yamaha-motor.com/outboard/products/subcatspecs/5/specs.aspx
Do You Have an Alternator?
The most certain way to find this out is to place a voltmeter on your battery terminals while the outboard is running at about mid-throttle or high idle speed. If the voltage you measure is above 13 volts, you have an alternator and it is working.
The most certain way to find this out is to place a voltmeter on your battery terminals while the outboard is running at about mid-throttle or high idle speed. If the voltage you measure is above 13 volts, you have an alternator and it is working.
Good point...
David I was thinking that. There is actually a voltmeter of sorts on my electrical panel. I noticed when the yard was chraging up the battery for the survey that it was pegged out. I am guessing if the alternator is charging the battery it will do that same thing. If that doesn't work I will break out the real deal and check it at the battery. Joe thanks for the link... that's some good info to have! Thanks guys! -- Jeremy
David I was thinking that. There is actually a voltmeter of sorts on my electrical panel. I noticed when the yard was chraging up the battery for the survey that it was pegged out. I am guessing if the alternator is charging the battery it will do that same thing. If that doesn't work I will break out the real deal and check it at the battery. Joe thanks for the link... that's some good info to have! Thanks guys! -- Jeremy
Title
I believe the term is "rectifier" when referring to these relatively anemic producers of electricity sometimes found on outboard motors. That may help when searching sites, etc.
I believe the term is "rectifier" when referring to these relatively anemic producers of electricity sometimes found on outboard motors. That may help when searching sites, etc.
"relatively anemic producers "
Just to tag on to the previous post ... the "alternator" in an OB is designed to trickle charge back in the minimal amount of power it consumes when started. It doesn't (at least on my Honda 9.9) have the power generating capacity to bring back up a starting battery and a house battery that have been deeply discharged by, say, a weekend of sailing or hanging on a hook. AT LEAST VERY QUICKLY. Run the thing for a couple hours and you'll make some progress. If you run it for 10 minutes out and 10 minutes back in, your batteries will slowly drop down. Tom Monroe Carlyle Lake
Just to tag on to the previous post ... the "alternator" in an OB is designed to trickle charge back in the minimal amount of power it consumes when started. It doesn't (at least on my Honda 9.9) have the power generating capacity to bring back up a starting battery and a house battery that have been deeply discharged by, say, a weekend of sailing or hanging on a hook. AT LEAST VERY QUICKLY. Run the thing for a couple hours and you'll make some progress. If you run it for 10 minutes out and 10 minutes back in, your batteries will slowly drop down. Tom Monroe Carlyle Lake
A matter of amperage
If your alt gives 10 amps, you'll get 10 amps of charge. For a small boat with a deep cycle, that's alot and will take no time to charge that "house" battery.
If your alt gives 10 amps, you'll get 10 amps of charge. For a small boat with a deep cycle, that's alot and will take no time to charge that "house" battery.
some added info
The rectifier converts AC to DC.... The alternator is an electric generator that produces alternating current (AC) but is rectified to direct current (DC) by diodes. An alternator converts the rotating motion of an engine into electricity to power a vehicle's electrical components and keep its battery fully charged. Details (sigh)
The rectifier converts AC to DC.... The alternator is an electric generator that produces alternating current (AC) but is rectified to direct current (DC) by diodes. An alternator converts the rotating motion of an engine into electricity to power a vehicle's electrical components and keep its battery fully charged. Details (sigh)
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