Julien4788 Posted September 27, 2021 Share Posted September 27, 2021 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. Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted September 30, 2021 Author Share Posted September 30, 2021 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 Quote Link to comment Share on other sites More sharing options...
Blackburn Mark Posted September 30, 2021 Share Posted September 30, 2021 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 1 Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted September 30, 2021 Author Share Posted September 30, 2021 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 1 Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 3, 2021 Author Share Posted October 3, 2021 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 Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 3, 2021 Author Share Posted October 3, 2021 engine a bit dirty, exhaust welded twice broken end of crankshaft Piston is melted, needs replacement Thankfully cylinder is in good shape, very smooth removed carb and airbox Removed engine from frame and detached carter support. Then split the case Finally removed the big pulley, i will replace the bearings 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 2 Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 4, 2021 Author Share Posted October 4, 2021 Part 1 is up Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 17, 2021 Author Share Posted October 17, 2021 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. Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 24, 2021 Author Share Posted October 24, 2021 Parts arrived Friday so here's the reassembly. I left out some parts as it was the same as the dissassembly. I set the squish to 1.5mm using my thinest gasket and use loctite on pretty much every bolt. Cleaned crank halves Heating crank halves to 220F New Bearings for the crank The bearings dropped right in (shown in video. Now putting the new crankshaft in. Closed the crank halves. used permatex ultragrey to seal them. Torqued to 10 Nm and used loctite. Installed carter support and crank back on the frame for easier reassembly. Carter support sealed with permatex ultra grey and torqued to 10nm with loctite. Seals pressed in (shown in video) à Installed flywheel, pinion pulley and big pulley. I replaced big pulley bearings following scout aviation tutorial. Flywheel torqued to 40nm Carburetor and reed valve back on. Torqued reed valve to 10nm and carburetor not torqued only loctite . Redid the whole fuel system with the custom primer bulb and blow tube Work area in my parents basement Reinstalled muffler,silencer and airbox Installed prop and gave the engine its first pull, started right up. 1 Quote Link to comment Share on other sites More sharing options...
Blackburn Mark Posted October 25, 2021 Share Posted October 25, 2021 Splendid! I bet that wasn't the first pull Sounds good and healthy... Fingers crossed that it holds up. Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 25, 2021 Author Share Posted October 25, 2021 it really was ! one squirt with the bulb then bam fired right up Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted October 26, 2021 Author Share Posted October 26, 2021 Video is up! 1 1 Quote Link to comment Share on other sites More sharing options...
Julien4788 Posted November 3, 2021 Author Share Posted November 3, 2021 Maiden flight! It's awesome! 600 feet per minute trimmed out 1/3 is incredible. 1 Quote Link to comment Share on other sites More sharing options...
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