280 ros not starting

[aussiebullet]

hi guys just wondering if ya got and ideas... i have a stock 280 with 35hrs on it that wont start. i have replaced plugs from the champions to the bpz8hn10. it has spark that jumps a 3/8 gap. got fresh fuel and oil. i have only just fitted it to my boat and it ran fine for bout 3hrs turned it off and now it doesnt wanna start. im thinking maybe my fuel pressure reg so getting pressure gauge on monday to test. so if anyone has ideas what else i should be looking at???:confused:

[Capt.Insane-o]

shoot some gas in the horn and see what happens.

[aussiebullet]

just tryed puting some gas down the horn but kinda fired and stoped tryed it again and nothin. done a comp test its 125psi on my gauge. no sure what it should be? seen the flywheel is a lil rusty where the crank postion sensor reads thinking that it would affect the spark tho. spark is strong.

[Jay Smith]

Stock compression on "healthy" 280 shout be 155 + cranking at sea level.. I would check fuel pressure at the rail and then check and see if the injectors are firing ( spraying fuel ) , sound like lack of fuel..

Jay

[aussiebullet]

hi jay thanks the reply. pulled injectors out and tested all 6 are firing with good spray paterns. hooked up fuel pressure guage and reading 32psi... so im thinking my gold reg is needing to be changed????? is there any advantage of getting an adjustable reg for it or a waste of time? cheers.

[Capt.Insane-o]

Is the battery fully charged?

[aussiebullet]

yea its a new battery cranks and trims fine. i will still double check tho. shud it run still with 32psi fuel pressure?

[Jay Smith]

32 is a bit low needs to be 39-40 running.... I am a stickler for system matched fuel parts. I'd go with the stock non adjustable bosch , available from Brucato their available in the states and are a Supporting Vendor of this site.. But it should start and slow idle at 32 PSI, me thinks you have another issue...


Good luck mate,
Jay

.

[aussiebullet]

new pressure reg and it fired up rite away. i put 2 different fuel pressure guages on it 1 type was the opti fuel and air guages and they were 9psi out compared to the new guage i brought. when i looked @ the opti guages they wernt sitting on zero. so theres a mistake i wont make twice.
wana say thanks to capt.insain-o and jay for the help. this site is great and guys like u that make it better. cheerz guyz.

[Jay Smith]

Your very welcome,

You'll find Scream and Fly is THE PLACE for accurate information with over 50,000 members the information pool is very great and diverse..

Jay:thumbsup::D;)