April Propwash 2018 web.pub

(b) Any type of bolts may be used to mount the carburetor. (c) The idle stop screw may be removed. (d) A needle stop device may be used, to keep needle fromturning/vibraƟng lose (i.e. fuel tubing, an aluminum clamp, etc.). (e) The exterior length of the needle may be shortened to fit under cowlings when necessary. (f) Any fuel pump diaphragm may be used. (g) Any metering diaphragm may be used v) Any exhaust manifold, header, and pipe may be used. vi) The spark plug must be one of the following: Champion RZ7C spark plug or a NGK CMR7H spark plug. Both must retain the factor sealwasher. vii) Zenoah EZ Starter Kit (part #GR26099) will be allowed. The pulley assembly (part #848-ESZ-7520) of the pull starter may be modified for the purpose of not using the spacers (part #848-8Y4-6100) or the space plate (part #580-44-79-01). viii) The Mount Plate (part #1155-74110) may or may not beused. ix) Any standard type of shaŌ collet nut may be used. No geezer wheel, beltstarƟng pulley, or extra weighted shaŌ collet nuts are allowed. x) The Zenoah water jacket (part #T2076-12210) may be modified on the outside by chang- ing the color, and/or machining in a design. Stock M5 x.8 water fiƫng thread must be retained. xi) Any type of water jacket cooling nipples are allowed (i.e. 90 degree, drilled out, etc.) . xii) Any type of replacement engine bolts may be used (i.e. stainless, chrome,etc.). xiii) The igniƟon coil (gray, part # 2629-71311) may be relocated using any type of bracket, but no shortening of the plug wire. xiv) If any updates are made to the standard G260 PUM motor by Zenoah, the Board of Di- rectors can vote to allow or disallow the addiƟonal parts to the above rules by a simple majority vote. Then modificaƟon of exisƟng rule to reference above: Current: D. SPECIALITY CLASSES 1. CLASSIC THUNDERBOAT a) Motor SpecificaƟons i) Engines will be a Zenoah G260 PUM. The Engine may run a stock 257 carburetor. No internal modificaƟons are allowed. All replacement parts must be from the original manufacturer and the same type en- gine (Zenoah 260 to Zenoah 260). No part swapping from othermanu- facturers or engine types is permiƩed. ii) Any pipe combo may be used. The pipe and muffler must be inside the boat and exit through the transom. Proposed: D. SPECIALITY CLASSES 1. CLASSIC THUNDERBOAT a) Motor SpecificaƟons i) Engines must confirm to NAMBA Class G-Limited specificaƟons, see rule B.3.a in this secƟon. ii) The pipe and muffler must be inside the boat and exit through the transom.