Personally i wouldnt use water, a gallon of lacquer thinner and a brass wire brush after blocking eveything off, i also use toilet paper put into all the intake and exhaust ports before the block off kit, because the block off kit is not liquid tight, if a small piece of tp got left in somwhere and i mean very small it would either burn up or dissolve, but i would dip the wire brush in the thinnet and scrub it, than rinse with thinner afterwards, thats just me, change the oil also afterwards, and after the first firing change the filter. Good luck