engine worn indications?
03-24-2007 | 09:17 AM
#1
engine worn indications?
ON MY OS 35 Max S R/Cengine I have noticed the shaft in front buy the thrust washer has some side play if I twist the prop side to side by hand, is this normal on an engine , it also after about 2 minutes of running needs another richer needle valve turn a few clicks , and then at full throttle its just dying and stalls could it just be worn with the side play [cold engine] and blowing out the oil at he front shaft, and Im useing a regular puller prop while Im trying to get it to run and I dont want it to over heat on the ground?????
03-24-2007 | 10:49 AM
#2
RE: engine worn indications?
A small amount of side play is OK. Some engines are this way new. Oil going out the front makes it a :wet nosed" engine. When the piston and liner are excessively worn, sometimes it gets harder to adjust the needle. Sometimes you can regain some performance on an iron/steel engine by switching to all-castor lube (about 25%). Castor will form a varnish seal on the iron piston and you will regain some compression. High silicon pistons (ABC, ABN, etc.) will not do this.
My guess is that you have been using RC fuel with synthetic lube of a low percentage, intended for larger BB engines.
Good luck.
My guess is that you have been using RC fuel with synthetic lube of a low percentage, intended for larger BB engines.
Good luck.
03-24-2007 | 05:17 PM
#3
RE: engine worn indications?
ORIGINAL: gcb
A small amount of side play is OK. Some engines are this way new. Oil going out the front makes it a :wet nosed" engine. When the piston and liner are excessively worn, sometimes it gets harder to adjust the needle. Sometimes you can regain some performance on an iron/steel engine by switching to all-castor lube (about 25%). Castor will form a varnish seal on the iron piston and you will regain some compression. High silicon pistons (ABC, ABN, etc.) will not do this.
My guess is that you have been using RC fuel with synthetic lube of a low percentage, intended for larger BB engines.
Good luck.Thanks for the information
A small amount of side play is OK. Some engines are this way new. Oil going out the front makes it a :wet nosed" engine. When the piston and liner are excessively worn, sometimes it gets harder to adjust the needle. Sometimes you can regain some performance on an iron/steel engine by switching to all-castor lube (about 25%). Castor will form a varnish seal on the iron piston and you will regain some compression. High silicon pistons (ABC, ABN, etc.) will not do this.
My guess is that you have been using RC fuel with synthetic lube of a low percentage, intended for larger BB engines.
Good luck.Thanks for the information
