Vittorazi Moster 185 Plus
updated January 22, 2021
As we service more and more of these engines, this page will grow. Servicing, troubleshooting, and repairing this engine is very similar to the Minari. Please check the General Info page if you do not find the information you need here.
Bearing replacement and crankcase disassembly/assembly – Here is how to replace the main crankshaft bearings and seals
Crankcase assembly/disassembly – see "Bearing replacement and crankcase assembly/disassembly" above
Crankshaft replacement – see "Rebuilding a paramotor" below. The paramotor must be completely disassembled.
Electrical and ignition troubleshooting – see "Ignition troubleshooting" below.
Electric starter information – schematics, photos
Engine leaks – see "Leaks of the engine, exhaust, and redrive" below
Fuel & oil specifications – 2% (50:1) oil mix 100% synthetic oil e.g. Motul 710 or AMSOIL Dominator, premium 100% unleaded or AVGAS. Note: the Moster 185 uses a DIFFERENT oil mix during break-in = 3.0% (33:1). Please see the "Owners manual" below. Please study the link if you want your engine to perform its best.
Fuel line size/installation – these are IMPORTANT notes that will prevent engine fuel starvation
General info – what is not in the owners manual might be found here
Ignition system – newer model Moster 185 engines have a magneto ignition system which is quite different than the older systems from IDM
Kill system, alternate – The inability to shut down a runaway engine, especially the larger engines, could be exceedingly dangerous. This alternate system routes a cord from the spark plug boot to some accessible place. Yanking the cord removes the source of ignition to the spark plug. The engine will stop!
Leaks of the engine, exhaust, and redrive – The Top 80 leak page can help you identify where the leak is coming from and what type of leak it is.
Owners manual – other than specifications, the owners/users manual is the place to go first. All owners of the Moster should read this excellently written manual.
Parts description (first version)
Parts description (later versions i.e. "dark evolution")
Parts description (later versions i.e. "dark evolution" dual)
Propeller info – General information including how to correctly attach and repair it
Reed valve problems – newer models of the Moster have an internal pulse port to power the fuel pump in the WB-37 carburetor. If the internal port gets clogged, the fuel pump will not work properly.
RTV – e.g. Permatex Blue or Ultra Grey. Used to seal case halves, some gaskets, and surfaces. Apply with a clean finger. Forget the spout that comes with the tube. It is useless. Use Ultra Grey for sealing surfaces that may become hot, like the exhaust flange gasket. MORE SEALANT IS NOT BETTER!
Spark plug installation – do NOT waste time tinkering unless the spark plug is new, correctly gapped, and installed.
