For sale is a used 4-stroke YS 91. I switched to gas and no longer need it. Was running when I took it out of the plane. Is an older model, not sure the exact time on it. Has good compression. I am not sure if I can find the check valve for it but will include if I do. Email for more pictures/let me know if you have questions.
Price includes shipping and paypal. Open to offers.
See bradk04 on runryder for other items I have sold in the past.