I ran a stump puller with the stock esc,it lasted 2 weeks then fried the esc.
So I got a losi mlst esc it cant handle the stump puller,goes into safty shutdown at just past 1/4 throttle.
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propulse B100
reedy stump puller,18t front shocks and turnbuckles,mip cvd's
Are you making sure that the gear mesh is not too tight.....the pp esc should have had no problems at all since that esc has enough amperage for a dual motor setup.