Bad Ass Mod Zenoah 290 PUM

This our new BA modified Zenoah 290 big block marine motor .
Manufacturers: MRCM , Zenoah
Manufacturer part number: MRCM -290PUM-BA
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We start with a 290 Pum and build from there .

Zenoah 290 PUM marine motor - 28mm stroke x 36mm bore = 28.5cc

  • Modify the cylinder to get the correct head clearance .
  • Relieve & modify the piston .
  • Hand modify the exhaust / intake / & transfer ports .
  • Hand check all components for straightness & proper tolerences .
  • Hand fit & reassemble to our specs for your hull type .
  • Install zero drag seals .
  • HP bearings .
  • Light flywheel .
  • Modify carb ./ stainless throttle shaft / billet cover / needle clamp
  • Billet isolator block .
  • Stainless bolts .
  • Install NGK sparkplug .
  • Dyno-test .
  • choice of carb - wt 257 / wt 1048

Please allow approximately 2 weeks build time .