MTD Novotrac conversion

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agniusm   10 MW

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MTD Novotrac conversion

Post by agniusm » Jun 14 2019 7:19am

Bought this for conversion working and after 1.5 years engine gave up. Looking for some info. What would be RPM at the OEM engine shaft generally? I need to pick the system Voltage to make it close to stock. The stock engine is briggs and stratton 259707-0146-01 but i cant find manual or specs cause its prob too old

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agniusm   10 MW

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Re: MTD Novotrac conversion

Post by agniusm » Jun 14 2019 9:45am

Its difficult. So blade tip speed should be 210-230mph. Blade is 66cm or 26".As much as i could dig up blade pulley is 7" or 178mm
and motor pulley is 100mm OD., thats 1:1.78 reduction.
Need to calculate motor rpm from this :cry:

evblazer   1 kW

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Re: MTD Novotrac conversion

Post by evblazer » Jun 22 2019 12:55pm

When etek was being used as a drop in replacement for mower motors it was ~3500 at 48v and fit in fine. I don’t know if specific mowers may have been different but that worked great on my craftsman
24v Challenge Hurricane Recumbent Cute85 powering Tandem crank.

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agniusm   10 MW

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Re: MTD Novotrac conversion

Post by agniusm » Sep 11 2019 12:58am

Made motor mounting plate:

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...and mounted the motor:

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Controller also mounted:

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Fitted coulomb gauge, 220V charging port, printed waterproof cap:

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Most components fitted. Battery, behind 30A charger, Eaton PSU:

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Video:


robby p   10 mW

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Re: MTD Novotrac conversion

Post by robby p » Oct 13 2019 7:11am

I like it!

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