Logo
FULL SITE MENU

AQAD30 ONLY 2500RPMFULL TROTTLE

C

COLM O REILLY

Guest
WILL NOT RISE ABOVE 2500RPM A

WILL NOT RISE ABOVE 2500RPM AT FULL TROTTLE.TURBO UNIT APPEARS TO BE TURNING FREELY BUT IS ONLY READING .4 BAR PRESSURE AT FULL TROTTLE??.ANY IDEAS WHERE TO START CHECKING.
 
" I have the same problem, las

" I have the same problem, last year the boat did 26 knots, this year it wont even plane and lots of acrid soot from engines. Has anyone given you any clues as to cause of the problem.

Any help appreciated "
 
Had the same problem. You hav

Had the same problem. You have one of two things happening. Air in the fuel delivered to the fuel injection pump or low pressure fuel caused by partly clogged filters or failed fuel transfer pump. The FI pump has a positive displacement pump that develops fuel pressure that is rpm relative ...more revs..more press...This pressure operates the auto fuel injection timing advance within the FI pump body. Your engine will not make HP above 2500 rpm because the fuel injection timing is too far retarded for that speed.
 
" Black smoke is sign of too m

" Black smoke is sign of too much fuel being delivered at that RPM. Clogged fuel filters will cause a reduction in Max RPM but NOT black smoke. If Max RPM is reached before full throttle is attained, then look at things such as hull contion and propeller, and a change in hull weight and distribution (ie. a new dingy on transom, more gear in stern of boat, new anchor and chain.) Fuel timing will not change unless work has been performed to the injection pump. A clogged air filter will also reduce RPM and create smoke, carbon build up on the Turbo Blades can cause a reduction in boost, have a skilled mechanic decarbon if necessary. Turbo boost is RPM related so low boost at low RPM is not unusual. Look for simple solutions, this engine is not powerful so any extra loads or restrictions can cause this rpm drop and black smoke. "
 
Back
Top