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Moster 185 classic


Julien4788
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Anyone has experience with the moster 185 classic? 

Local guy is selling one with broken crankshaft very cheap. I'm trying to determine if it's worth fixing with around 800$ of parts or buying a moster silent for 4000$ and swapping it. The ask price is 1500 with sd2 frame, two propellers, seat, new cylinder head and few other parts. He says the engine has 120 hours and the pull starter rope wrapped around the flywheel and broke the crank shaft for some reason. He came down with reduced rpm and landed safely.

do propellers fits on new moster's?

is the mount pattern the same as the new moster's?

Is reliability an issue with old moster's?

 

i am currently flying a sd1 frame with a ros 125 which i quite like but lacks power. maybe the rings are done on my ros 125 i will be checking compression when i receive my tester.

 

 

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Bought the engine after speaking with my instructor friend and Eric Sigier from AirProParamoteur.

 

My guess is that the rings and piston are good, the magnetic flywheel broke off so that would explain the drop in rpm. I'll start by tearing it down then just changing crankcase bearings, seals and crankshaft. Parts are in stock here

 

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3 hours ago, Blackburn Mark said:

Some images and a writeup of you rebuild adventure would be cool.
Popular engine like that... It would be nice to get a closer look at its guts :) 

okay i will do that! Definitely will be a learning experience for me and probably others

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picked up the engine yesterday. Teared it down today so now i am waiting on parts. Overall it's in better shape than anticipated. i think the previous owner heated the crankshaft  to pull the starter pulley assembly (not needed) which caused the faillure.

main features

2x new Carabiners

Apco universal seat in good shape 

15 liter gas tank 

solid double hoop frame 

3  pull starter assembly

brand new cylinder head 

gaskets for carb, exhaust and cylinder head

brand  new carbon prop 130cm and wood prop 125cm

 

pictures will follow

 

 

 

 

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engine  a bit dirty, exhaust welded twice 

AM-JKLXudk5yX2B21-5qi8arELNegRkK940lgyFQ

AM-JKLWBQvDaYX3vWOgXlS8WMidToIuECp9vCglx

broken end of crankshaft

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Piston is melted, needs replacement

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Thankfully cylinder is in good shape, very smooth

AM-JKLUNBqQJfkLMKowk2LT1Qn-PNed3-OJjvb8q

removed carb and airbox

AM-JKLV2FUjW-sUDO9tRsaV1clEajBvxqbsVWO-Q

Removed engine from frame and detached carter support. Then split the case

AM-JKLWJezmmDbIqHlJs74M_tDv0AyquMHU-YsX4

Finally removed the big pulley, i will replace the bearings

 

AM-JKLVWpGGuSPQBqUTuNOQjfj6gMK7a1RcAD5w4

 

So far everything is good exept for the crankshaft and piston. I will replace all seals and bearings. I will use permatex ultra grey to seal the case back together. 

 

Will post videos eventually

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  • 2 weeks later...

Might get the parts next week. they ordered a crankshaft last week they had just changed one on another machine.

started to clean up the frame and redo the fuel lines. checked the carb and it looks like it was overhauled recently. I will reset the carb to factory settings because it was obviously not running right.

 

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