Hey, that motor ran pretty darn good with only 5 cylinders! It was only when some of the old coils and the TPS got out of adjustment that it started running crappy. Yamaha builds one heck of a motor for psuedo slackers like me...LOL!! The Motor runs unbelievable good now. But this motor HAS had a lot of work done and upgrades over the years. Some include:
Rebuilt power head in 1998
Completely new lower unit in 2009, rebuilt in 2011. (Do to bad shaft seals)
New fuel pumps (2) and 3 rebuilt carbs in 2009
New thermostats (2) in 2011.
New empeller in 2011, 2013, and 2015.
lower unit gear lube changed every year since 2010.
3 new coils in 2010 and the other 3 replaced in 2015
Only non-ethanol fuel used since I took over the boat in 2009.
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