posted
Okay, I'm confused and a bit worried. I am on my third take of breaking in a C5 RR. I idled through the 1st tank, made sure the piston was at the bottom then I let it cool down for almost a couple of hours. When I went back to run another tank, the piston got stuck at the top of the sleeve when I tried to start it again. So, I took off the head and the button and there was some gummy residue on the piston and the top portion of the sleeve. I cleaned that off and re-lubed it, then put button and head back on and started it and ran thru another tank. When I went to start it again for the 3rd tank, I had the same problem so I applied the same fix again, and it started right up. I have broken in several engines in the past (two .15's, two .12's and one .21) and I have never seen this problem. So I have a few questions on this matter;
Is this something I should be worried about, or is this normal for an RB C5 for the first few tanks?
Is the gummy residue caused by running rich during break-in? BTW ( I have not changed any of the factor needle setting yet)
How do I stop this from happening?
Posts: 7 | From: Maryland, USA | Registered: Jul 2002
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posted
This is not a normal circumstance, but it does sometimes happen...this situation can sometimes be caused by reactions with ingredients in certain fuels, or by the use of certain engine additives, or even by the use of improper (for example, silicone based) oils on the air filter...these contaminants could even be left in your fuel tank from prior usage.
The best solution is to carefully disassemble the engine and clean the internals carefully...we prefer denatured alcohol, but be sure to completely dry this off and immediately oil the bearings (RB Concept part #1400 works well for this), and do not spray too much on the rubber pieces (o-rings, carb boot, etc.), as this can cause these pieces to become prematurely brittle.
After reassembly (and use a good quantity of the #1400 oil), it is also a good idea to clean your gas tank in the same way, replace the air filter with a new one, and replace all fuel lines, etc.
We would also suggest using a new bottle of fuel just to be certain.
After this, you should not have this problem, but if you have any questions or concerns, the best bet is to contact the dealer where you purchased the engine for assistance.
posted
Thanks alot for the quick response. I took the engine completely apart, cleaned, lubed and re-assembled engine. Then proceeded to complete my break-in period. It went flawlessly, no more problems with the piston sticking. When I finally worked the needles down to 1.5 out on the Main and 2.5 on the Low,,,, OH MY GOD! The power of this engine is amazing, I discovered quickly that this engine eats tires for lunch, dinner, breakfast, and basically whenver it wants too. Thank=you for the help!
Posts: 7 | From: Maryland, USA | Registered: Jul 2002
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