[jonesy54]

i've never dabbled with a block off kit but you don't want to put oil in your crankcase. that's the point of mixing it with the gas.

http://www.pwcforum.com/vintage-jetski/2436-1977-js440-oil-question.html

http://www.pwcforum.com/vintage-jetski/3540-650-sx-basic-questions.html

40:1 or 50:1 would be a good guess for the mix. its 40:1 on 550's but 50:1 on the 550SX's with the reed valves. might have to ask someone smarter than me to get a solid answer.

 

[jonesy54]

yeah i think i would out a dab of oil or something on those joints as you button it back up...maybe a shot of oil on the cylider walls too.