I am going to replace my universal m35b it’s in good order, serviced every 6 months, new fuel pump 2 years ago, new exhaust elbow done 4 years ago, new alternator 2 years ago. New heat exchanger 4 years ago. The clock shows 3500 but as it’s the original engine 1995, i think that’s wrong so i don’t know the true hours. I suspect but don’t know the clock (rev counter) may be only 10 years old. I have had this engine for 7 years, the clock said 500 hours on purchase with my boat sail number 1588. The engine will be in the uk and the buyer will need to arrange shipping. I can send photos and videos of the engine while still installed 

if you're interested, please contact me on nigel.frith@gmail.com