[pelican]

soft carbon deposits on intake valves is nothing new - BMW had this problem with their v12's,that was YEARS ago...

it's never a bad idea to do a little decarb,once yearly...merc power tune,squirt a can down through the throttle body...that will clean the deposits away.

propping is the most important thing you can do ! take the time required to get your rig dialed in !

an often overlooked point about propping - summer months,the humidity is the highest,the motor can actually lose 10% RPM,in these conditions...always keep that in mind
duplicate weight conditions,full tanks,and enclosure down - run it wide open throttle - you want to see max rpm,with a full load...every inch in pitch,it yields about 150RPM
get the motor height correct,get the correct prop - the results are worth the time !


ethanol fuel / non ethanol fuel - it's the same !

phase separated fuel - it will shut the motor down...fuel seperates out,when water is in the fuel.works like this: water,the alcohol mess,then fuel.the pickup tube,it draws fuel from the bottom of the tank - water is drawn up first,choking the filters and killing the motor - isn't any motor,that I know of,burning/running on water...NOTHING will cure this,except drawing the water/alcohol mess out - then finding the source of the water intrusion...sea foam,startron,whatever - it's a waste of money! and it's useless !

phase separation is caused by water entering the fuel system - fuel will not phase separate without water.if it did,every boat,gas powered in a northern climate,would have a serious problem,after sitting for the winter months...

my pressure washer - it hadn't been used since last January - it was sitting with fuel in the tank since then...it was loaded into my boat,for my move to florida...the boat sat at a friend of mine's place,in south Carolina,for the torrential rains they had - recall the flooding and the closure of I95,due to flood damage ?
I finally needed to use the pressure washer a few days ago...3rd pull it fired and ran,untill I was done what I needed to do...
my chain saw - it has sat in it's case,with fuel in it,for over a year - few pulls,and it was screaming !

water in fuel - it causes problems....



4 strokes:
these will make oil,due to condensation - a few other problems can cause it as well...let's focus on condensation...

these motors need to be ran at temp,to "burn" off any moisture...a good full throttle run,will accomplish this...