I am sure this question has been asked before but here is my problem. My boat is a Stratos 375 with a 115 Yamaha 4 stroke. The problem is that at wide open throttle I am only able to get about 4800-4900 RPM. WOT is rated at 5500-6000 RPM for this motor. I currently have a 13.5 by 18 prop. What way do I need to go with the pitch to increase the RPM? Is it worth the money for a new prop for the few extra RPM's?
That’s an interesting point. While I understand how Amps work, I can’t say I’m fully versed in the draw of modern on board chargers.
By modern code, outdoor and outbuilding outlets should be 20 Amp. If your outside or garage outlets are 15 Amp, they’re undersized. But that is quite possible if the garage was built before that code became enforced.
With heavy use, you may not be able to keep up on daily charging without the 10 Amp per channel charger, however that’s with very aggressive use for consecutive days. On our June muskie trip we run up to 15 hours a day for up to 7 days on a 24V Ulterra and by mid week we’re starting to see the batteries not reach full charge. That’s a lot of bank running at nearly 2 mph on windy shores.
We charge at a dock with up to 6 boats per dock plugged in - some with 36 volt systems. Now I’m not sure if all the outlets are on a dedicated circuit but I’m betting they aren’t. But they’re all 20A outlets with a lot of draw on them. At max draw, they’re not keeping up but also not tripping the breakers.
What I’m saying, without a technical review is: you’re probably fine either way. You probably won’t tax your batteries so much that they can’t recover on a 5 Amp per channel overnight charge and a 10Amp per channel charger probably won’t be too much to plug into your 15A outlet - if it really is a 15A. If you’re sure, you’re sure, but I would double check if you’re not 100%.
Another question- I wil be running 24 volts on the trolling motor for this boat, what amperage onboard charger should I buy? Some have told
me 10 amps per channel, but at full draw that would be 20 amps, and my outlets at home and where I plug in at the lake is only 15 amps,
is 5 amps per channel enough to charge batteries overnite after using spotlock during the day? Thanks for the help.
Question
klw
I am sure this question has been asked before but here is my problem. My boat is a Stratos 375 with a 115 Yamaha 4 stroke. The problem is that at wide open throttle I am only able to get about 4800-4900 RPM. WOT is rated at 5500-6000 RPM for this motor. I currently have a 13.5 by 18 prop. What way do I need to go with the pitch to increase the RPM? Is it worth the money for a new prop for the few extra RPM's?
Link to comment
Share on other sites
3 answers to this question
Recommended Posts