Uploaded September 2026 | Updated September 2026, 1 day ago

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The 5-rotor runs great on E85, but when I switched back to gasoline, I ran into a strange fuel system problem.

In this video I test the fuel system from the electric primer pump to the Waterman mechanical fuel pump and try to figure out why the engine has trouble taking over on gasoline. I also compare fuel pressure during cranking and investigate what changes between E85 and 93 octane.

This is another step toward getting the MF5 completely sorted and reliable enough to drive anywhere.

Mazzei Formula MF5
5-rotor billet rotary
3.3L turbo
Holinger transmission
Haltech ECU

#MazzeiFormula #5Rotor #RotaryEngine #MazdaRotary #MF5 #renewablelubricants