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Permalink Reply by John Austin 5 hours ago

I'm not sure if the 650 has a different cowl, but the 750 STOL in the lower picture does not have the current cowl.  The cowl pictured only has about a 1" lip at the aft lower edge where the air exhausts.  The current cowl extends lower/deeper behind the oil cooler opening and smoothly expands to a larger opening.

I had to extend the 1" lip to about 3" overall to aid cooling with my Gen 2 and never did upgrade to the newer cowl.  When I upgraded the engine to the Gen 4, it cooled even better than before - seems cooling is no longer an issue with the Gen 4!

If no one chimes-in here, I'm sure Nick Otterback at Arion Aircraft, the Jabiru engine dealer/repair center, can tell you if the current 650 cowl is any different from the 750 STOL.

BTW, since the Jab is so light and a longer engine with 6 cylinders - it sits much further forward of the firewall for the W&B to work.  This results in a longer, slender cowl which really helps make the Zenith designs look less "boxy."  IMHO it's the best-looking cowl on a Zenith aircraft!

John

N750A

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Permalink Reply by Mark Pensenstadler 3 hours ago

John, can you determine from the cowl in the 750 pic above if that airplane has the 4 cylinder or 6 cylinder Jabiru? Also, the Arion website is about 13 steps below useless for gathering any information. I guess they want people to call.

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Permalink Reply by Roland Ashby 3 hours ago

I bet you can send them an email and they would send you a picture of the current cowl.    I purchased the FWF kit from them 4-5 years ago and it was a different cowl then it was 10+ years ago.    I belive the only difference betwen the 650 and 750 FWF kit is the engine mount.   The 750 picture above is with the 6 cylinder engine.

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Permalink Reply by Mark Pensenstadler 27 minutes ago

Thanks!

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Permalink Reply by John Austin 1 hour ago

I agree with Roland - it's a 6 cylinder cowl.

John

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