I brought a fwf kit from Pete K a few years back. With the Gen 4 3300 larger aluminium heads Will it still fit inside the old cowl? 


Views: 243

Reply to This

Replies to This Discussion

I thought that was a good question and emailed Arion Aircraft/Jabiru Engine Services:



The Gen 4 is a drop in replacement engine for all installations except some very early 2200s.


The Zenith 750 has specific airducts for the cowl which don’t fit the gen4. However the gen 4 airducts are easily adapted to the 750 cowl, we have several 750s flying with Gen4s.


Thank you for passing along the engine class seminar. I will have to find your group and join it.


Nick Otterback

General Manager

Arion Aircraft LLC

Jabiru Engine Services or 931-680-1781

2844 Hwy 231 North

Shelbyville TN, 37160

Open Mon- Friday 8am-5pm



I got my FWF kit from Pete in 2018 and my Gen 4 fit well.  The only issue was the second camloc on the left side did initially rub on the airmuff.  A small fiberglass patch job was all that was required.  I believe I fit the cowling without the airmuffs on the cylinders...




New from Zenith:

Zenith Planes For Sale 

Classified listing for buying or selling your Zenith building or flying related stuff...

Custom Instrument Panels
for your Zenith

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.

Custom Upholstery Kits for your Zenith Aircraft:

Zenith Vinyl Upholstery Kits

Zenith Apparel from EAA:

Zenair Floats

Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz

Builder & Pilot Supplies:

How to videos from

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit for the latest DVD titles.

Aircraft Insurance:


West Coast USA:

Pro Builder Assistance:


Transition training:

Golden Eagle Aviation

Pianosa Flying Farm

Aircraft Spruce & Specialty for all your building and pilot supplies!

© 2021   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service