blwngsket

Looking for some ideas. Just purchased an 85 Formula 272 with twin 5.7's. I put it in the water and made the run from the ramp to my house (5 miles) without issue ( aprox 50 mph). I idled thru the no wake to my dock (1/4 mi), then tried to turn the boat with the throttles (one motor forward, one reverse). The motors died and had a problem starting. After aprox 3 mins they fired up and I made it to the dock. I idled at the dock for a couple minutes and left. After passing thru the no wake, I started to power up. At aprox 2700 rpm the port motor shut down. I restarted and it shut down at tthe same rpm.
Now its on the trailer. drives up. Starbord starts just fine but the port wont. Turns over, wont fire.. HELP.....
The boat sat for about 1 year or so with aprox 1/2 tank of fuel. I topped it of with 92 octane before hitting the water.

RT930turbo

Start with your fuel filters... If the boat sat that long your could have some water in the system.

blwngsket

That was my thought, but wouldn't that effect both engines equally?

Tony

tinman565

Did you check to see if the port motor has spark ? I would check the fuel/water seperator..the carb filter (if there's one in it)...and the distributor cap and rotor sir.

blwngsket

Thanks for the replies. All things on the Saturday list.
Thanks again guys

Tony

blue thunder

Definatley fuel related and could be clogged carbs from the chit ethanol seperating.

RT930turbo

It really depends on where your pickups are. One may be higher than the other, allowing that engine to pull good fuel, while the port motor is sucking in all the crap from the bottom.

Good luck.

teamsynergy

Another note.. dont run them with the drives all the way up.. you will kill your u-joints...

blwngsket

Alright guys. I don't know much, but this is what I do know. Plenty of fuel getting to the port side carb. Turn the key to power, but not start the starbord motor and the gauges jump to life. Not so port side. Power at both solenoids (sp?). Power to starbord coil. No power to port coil. Going to replace the fuel/water seperators tomorrow.
Could this be an ignition switch issue even though the switch turns the motor? The cap and rotor wasn't bad. Cleaned up with a wire brush.
Hope to figure this out tomorrow. It's fleet week in the SF Bay. Sunday the Blue Angles are to perform over the bay. Be nice to see it from the boat.

Tony

shaun harrington

do you have lanyards?can you probe the purple wire on the back of the ign switch?