Where did you get 2,500 lbs for the Malahini weight?
Glen-L lists the Malahini as 475lbs stock, without engine, using 1/4" bottom plywood and single-layer top deck.https://www.boatdesigns.com/products.asp?dept=339
Engine.. a big 115 HP 4 Stroke Engine might weight around 400 lbs if you go to the 'max' with it.
Add 200 lbs for a very large full fuel tank.
More likely between 1,000 ~ 1,200 lbs fully loaded (assuming no passengers of course).
If it was over 2,000 lbs I would probably opt for brakes, but it should be well under that number.