speedracer2284

My Feedback: (15)

Hello all, I have a moki 1.8 that was bought used here on rcuniverse, I set up the engine with a bisson pitts, large fuel tubing and a perry pump. the engine runs great, idles great and starts very easy, But it won't turn over 7000 with a bolly 18x8 prop?? I'm using 10% sig fuel and have tried a couple differant plugs, os type f, os 8, fox miracle, I have also tried differant pump settings and high speed needle settings?? what's the deal, Please HELP

ckangaroo70

My Feedback: (51)

ENGINE RATED HP (USA) RATED HP (JUST ENGINES)
Moki .61 2.2hp 2.1hp
Moki 1.35 3.45hp @ 9800 3.3hp (APC 16x8 @ 9300-9500rpm)
Moki 1.50 3.85hp @ 9500 3.7hp (W2 18x8 @ 7900)
Moki 1.80 4.1hp @ 9200 4hp (Master 18x10 @ 8300)
Moki 1.80B to follow asap
Moki 2.10 4.95hp @ 8800 4.5hp (Smart 20x10 @ 8000)


It seems you should be getting around 8500 rpm with that prop. Did you buy the engine new or used? If used, then how is the compression? Hope someone didn't sell you a worn out one!

HalH

My Feedback: (12)

I thought it was best to use no more than 5% nitro with a Moki.

speedracer2284

My Feedback: (15)

bought it used, it runs great, just doesn't turn the rpm's??? I'm using the tach in my 9Z wc2, and have tached it several times

speedracer2284

My Feedback: (15)

it has plenty of compression, too??

JoeAirPort

My Feedback: (41)

bad ring? bad bearing?

speedracer2284

My Feedback: (15)

OK Ok, I have tore the engine down, ring seems fine, backs up the good compression, the bearing has quite a bit of rust on it?? but it still spins ok?? could this be the probelm?? how do you remove the crankshaft out of the front block??? to change the bearings?

JoeAirPort

My Feedback: (41)

http://www.justengines.unseen.org/moki_parts.htm (exploded view of engine).

E-mail this guy and ask him. He works on Moki's all the time.