RE: Sundowner 50 - a few more recent Jett 56 installations
Examples of a very clean installation.
One thing we learned along the way.... sometimes the plastic engine mounts were flexing and causing bizare engine behavior. Hard to explain, but basically it disturbs the rhythem of the engine. Metal mount helps a lot solid installation. There are couple of companies that are making metal T-mounts that are direct replacements for some of the ARF mounts out there. The one shown here is a jett mount. Not a drop in needs a spacer, new mounting holes. Not a big project. Available set up to mount the needle valve as part of it if you wish (uses the stock needle valve parts)
edit: yes, that is a check valve on this one just before the needle valve assembly. Prevents drawing air in when removing air from the bubble tank.