13 HCR motor removal?

REALLY , REALLY should pull motor and at the least, strip down to bare bottom end and flush the lower case/crank assembly. rotate crank and feel for smoothness of crank bearings. I have done this method of flushing the lower case assemble with gas and holding the case upside down while someone spins the crank. I have had a few motors cleaned this way and have lasted for hundreds of hundreds of miles afterwards, but you are really taking a small chance you missed a small piece of metal and will ruin a crank bearing as soon as you try running the motor again. If it was my personnel sled I would do a total tare down and pull the crank to do a real good job at flushing all the bearings.