Originally Posted by
Chris Peralta
If you plan is to eventually replace the conrod in the S7 you should pull the engine totally apart and make sure everything else is in good condition. If you ran the same rod in the engine for all 11 gallons it's very likely that there was some slop where it connected to the crank and may have wore out the crank pin slightly. Use some calipers and make sure the pin measure the same all the way around and does not have an oval or egg shape to it. If the crank and rod both need replaced it may be a better idea to just replace the engine.
Allready done!! Pulled the whole motor down to bare crank case checked all bearings all good crank etc..
last weekend when I could not get a tune on the motor and the warmup of the Amain it would not idle with a new plug so I knew that something was internally wrong pulled the back plate off and seen a very small portion of the bushing was missing but the rest of the bushing was there but was cracked in about 3 or 4 pieces. I figure that the bushing was egg shapped but it was not it was broke into small pieces never seen one do that before. So there was a little slop with that small 1-1.5mm piece missing. But the crank pin looks fine not egg shapped at all...