I have Twin BF 150 HP Honda Motors on My 7 metre rig that now have 100 hours on each and they run brilliantly.
On about 4 or 5 occassions one or both smoke really badly on initial start up at ramp.
Smoke pours out of the exhaust (white grey) for about one to two minutes and as it warms up the smoke goes completly.leaves oily film in water.
Seems to be an issue that fixes as the motor warmes up.
Only once both did the same together. smoke filled ramp big time....embarracing when you have 4 strokes on a relativel brand new boat.......
Motors stored down position. Only have them up on transport to ramp which is short distance. Honda accredited dealer checked and no problems?????
Any ideas or any one else had this problem Both Motors about 2008
yep damn gravity .............. no just kidding you are lowering your motors down to low after use and oil is running down it to cylinders and getting past the rings.
leave motors up a bit so oil cannot drain down past rings .. at least leave them level................. not tilted back .................problem will go away
Yes your on the money, tried not leaving motors fully down (up 10 to 15 degrees) has eleviated smoke at start completely..
Obviously oil is gathering near piston ring when motors ar left fully down. I located a head honda mechanic whom sugested that motors up to around 2008 did have this issue, and colder conditions are affecting oil viscosity which is exacerbating the problem.
This explains the odd smoke on cold starts.
Relief????
Twin BF 150 HP Initial start up smoke problems
Linear Mode
