Break in for a chromed engine?
04-12-2013 | 01:07 PM
#1
Break in for a chromed engine?
Hi Again:
Is there a good method to use when breaking in a chromed engine?
Today, I got out my old ST G20/15D that has had the bore and the crank pin chromed. I ran it on a large 10x6 prop to get at a very undercompressed condition and as rich as it would go and still continue to run. I did this for about 4 minutes and then switched to an old Cox 8x4 gray prop. I ran this for about another 5 minutes to start the break in process a and to find starting settings for running. I ran this prop at an undercompressed and rich condition that was recorded to be 14,000 plus rpms.
What should I do next? What I want is a sport engine that is very easy to start after I break it in. How much more bench time do I need on this engine?
Any suggestions?
Tia,
Franchi
Is there a good method to use when breaking in a chromed engine?
Today, I got out my old ST G20/15D that has had the bore and the crank pin chromed. I ran it on a large 10x6 prop to get at a very undercompressed condition and as rich as it would go and still continue to run. I did this for about 4 minutes and then switched to an old Cox 8x4 gray prop. I ran this for about another 5 minutes to start the break in process a and to find starting settings for running. I ran this prop at an undercompressed and rich condition that was recorded to be 14,000 plus rpms.
What should I do next? What I want is a sport engine that is very easy to start after I break it in. How much more bench time do I need on this engine?
Any suggestions?
Tia,
Franchi
04-13-2013 | 01:14 AM
#2
Senior Member
RE: Break in for a chromed engine?
fly it like you ran 'til now, then slowly adjust to leaner mixtures. Be sure to have lots of oil in the fuel. (at least 25%)
