Engine won't start - newbie question

dschonfe

New Member
Nov 12, 2007
3
Edgewater, MD (South River)
Boat Info
2005 Sundancer 320
Engines
Mercruiser Inboards
Still relatively new to diagnosing problems here, so please forgive the naiveness in advance. The boat is a 2005 Sea Ray Sundancer 320, with twin Mercruiser Inboards (325s I think?)

After a few years of only minor problems, this weekend while doing our final cleanup of the boat for the season I couldn't get the port engine to start. The starboard side started ok, although it did stall the first time and I had to do it a second time. The port side, however, would not stay running. I would hold the button down, and it would turn over, but the RPMs would go down to zero once I let go of the button. It would just stall. It worked fine last time, although that was a few weeks ago and the weather is much colder now (about 60 degrees).

I'm having the techs look at it this week. The batteries are fine, there is plenty of gas, what else should be checked to diagnose the issue? No alarms on the SmartCraft. Visual inspection of the engine everything looked ok.

Thanks for your suggestions!
 
Last edited:
I just got the bill from my marina....we changed fuel filter on starboard engine, switched fuel pump relay switches, and guess what??? Even after the computer diagnostic check showed nothing was wrong... it was the iac valve. The previous comment is correct! Sea Rays are notorious for this issue. Get it changed and you will be running smooth!
 
Could some post a pic of the IAC, I'm not familiar with what it looks like...not sure where it would be on my 280, but am curious.
 
I just got the bill from my marina....we changed fuel filter on starboard engine, switched fuel pump relay switches, and guess what??? Even after the computer diagnostic check showed nothing was wrong... it was the iac valve. The previous comment is correct! Sea Rays are notorious for this issue. Get it changed and you will be running smooth!

Mercruiser's are notorious for this issue, no need to bad mouth SeaRay :grin:

edit*Even though you saw what it looks like, that pic doesnt really justify where it is, you'll find it on top of the intake manifold
 
a little perspective for the location of the IAC valve. Just behind the throttle body. Mine is not black because that is the replacement

w2f-IACvalve.jpg
 
I just got the bill from my marina....we changed fuel filter on starboard engine, switched fuel pump relay switches, and guess what??? Even after the computer diagnostic check showed nothing was wrong... it was the iac valve. The previous comment is correct! Sea Rays are notorious for this issue. Get it changed and you will be running smooth!


maybe the problem is the mechanic not the Sea Ray!
 

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