Originally Posted by
Dxt22
I opened the engine and saw that it's gummed up pretty bad, so I'm going to try soaking it in mineral spirits for a while.
Is it normal for the piston to be caught at TDC while idling after running? When I see that there is almost no fuel left, I usually just let it idle until it stalls and then put it on the starter box with the glow plug to burn off excess fuel, but I couldn't do it last time.
I have Sonic .12, its Picco base. This is my first Picco engine. I've found the pinch zone for this engine is larger than Nova. When u check the sleeve, u can easily see 3 different zones. It shd be visible 2 zones when the break-in is done. Of course gumm is built-up because it still running rich on 25% fuel, when temp goes up, the gumm will gone.
I graduately lean the HSN and keep running it, consumed around 1L break-in fuel and 1.2L 25% fuel, its still slightly caught on the pinch zone. So keep some temperature and pay some for time for it.