Which prop for break in?
01-16-2007, 04:13 PM
#1
Thread Starter
Which prop for break in?
Hi, I have a new (old) Brison 3.2 that appears to have been run very little if any. I am going to treat it as brand new and go through a normal type break in. I have 2 props at my disposal. They are both Menz S. One is a 20/12 and the other is a 22/8. I ran the engine twice already(short runs) with the 20/12 and was getting about 6650/6700 rpm static. Should I switch to the 22/8?
01-16-2007, 06:56 PM
#3
RE: Which prop for break in?
ORIGINAL: bubbagates
Yep, use the 22x8. You want to run this engine in the 7000rpm range even after breakin. At that rpm, it's as powerful as any DA50 I have ever seen
Yep, use the 22x8. You want to run this engine in the 7000rpm range even after breakin. At that rpm, it's as powerful as any DA50 I have ever seen
I run a Fox 3.2 (virtually the same engine--same cylinder and piston) on an NX 22-8. It's turning about 7200--7300RPM These industrial engines with a Sachs cylinder need to run up in the 7000RPM range to put out good power. Lug it down to 6300RPM and you'll just overheat it.
Let 'er spin.
01-16-2007, 07:25 PM
#4
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RE: Which prop for break in?
Do what RCPilet said...
You want to let the engine spin during the running-in (low load). And don't run them rich! This just builds up too much carbon.
You want to let the engine spin during the running-in (low load). And don't run them rich! This just builds up too much carbon.
