Official 330/350 (2008 and newer) Thread

Your plug wires should last several years. It could be plugs, fuel filter or air intake. When did you last change your fuel filters? Could have water in the system but then I would expect alarm to go off.
 
Just had 100 hour service done. I imagine they would have checked plugs and filters, will need to check invoice and definitely check up on this. They are coming out next Tuesday with their mobile service.
 
Hello I got my extended through Mercury since my boat was technically new also my mechanic had his laptop connected to my engine while under load and could see that i was missing on one cylinder also you could smell raw fuel after a while since the one cylinder completly quit my wires were run from the factory to close to the exaughst manifold and burnt alittle thats why i needed wires the platnium plugs will fowl according to the mechanics if you do not treat your fuel reliously and if the boat sits also if you dont stretch the legs and run it up to cruise speeds IE running at trawler speed may conserve gas but this ethinol can quicken plug faluire if all you do is idle which I dont but still trawler speed enough ill cruise trawler for a while then stretch them out if out wasting fuel but destination cruise Ill run 3400 rpm all the time with the ecm trying to smooth out the missing cylinder you really need the mech to run the boat under load with his dianostics Good Luck
 
Usually they do oil change check and top off fluids on the 100 hr service and dont do diagnistics unless you specfy your having and issue I thought the same thing and usually dont put the boat under load so now I tell them specifically what is wrong Im in the service buisness and boat service and what I do are two different animals I brought my boat back three times for the same issue they didnt find it until I took the mechanical out and had him hook up his diagnostics while i pushed the boat
 
Thanks mainstream. I will have my dealer thoroughly go thru the diagnostics especially while under load. I appreciate the advice.

I usually run around 3400 RPM as well, though I burn on average about 38-39 GPH. Are those numbers close to what you get? I have the 8.1 V-drives.
 
At 3200@31 gph 3400@34 gph after plugs I was 3200@34 and 3400@35 to 38 I went from .7 to.8+ mpg hope this helps
 
Thanks mainstream, I will check my fuel usage again once repairs are made.
 
mainstream said:
Dose any one know what those dimmer switch dOse on the dash can not figure it out
Click to expand...
I believe with the NAV lights on which lights up the switches it dims the brightness on the switches.









\witch illumination.
 
.... so my issue was just fouled plugs and needed two new wires. I'll do a test run this weekend to folow up. Thanks for all the advice.
 
Hello all - I have an issue with my "Power Vent" - there are 2 air intakes on board - 1 in the head, and 1 over the cooktop in the galley - the one in the galley has stopped working. When I turn the switch "on", the fan runs, and air is flowing into the vent in the head; the problem is air isn't going up the one in the galley. Any ideas/suggestions? I unscrewed the vent plate (4 screws), thinking i would see a motor, or something, but didn't see much except what appears to be some kind of ductwork...
 
ziekman@cox.net said:
Hello all - I have an issue with my "Power Vent" - there are 2 air intakes on board - 1 in the head, and 1 over the cooktop in the galley - the one in the galley has stopped working. When I turn the switch "on", the fan runs, and air is flowing into the vent in the head; the problem is air isn't going up the one in the galley. Any ideas/suggestions? I unscrewed the vent plate (4 screws), thinking i would see a motor, or something, but didn't see much except what appears to be some kind of ductwork...
Click to expand...

I believe both fans vent out the same fitting on the side of the boat. There is one switch for the head fan and one for the galley. Are you saying that when the galley fan switch is on it is running but not pulling any air?
 
Yes, when the galley fan switch is on, it is running but not pulling any air. I did think that if either the head or galley switch was turned on, that both fans would also turn on. I didn't realize that they were handled, independantly, via their respective switch. I'm pretty sure when the galley fan switch is on, no air is being pulled through the galley vent, but air "is" moved through the head vent.
 
ziekman@cox.net said:
Yes, when the galley fan switch is on, it is running but not pulling any air. I did think that if either the head or galley switch was turned on, that both fans would also turn on. I didn't realize that they were handled, independantly, via their respective switch. I'm pretty sure when the galley fan switch is on, no air is being pulled through the galley vent, but air "is" moved through the head vent.
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I Looked at my boat today and you are correct when one switch is turned on both vents are activated (I guess only one fan for both). My galley vent pulls very little air. My head vent (down by the toilet) pulls more air but not very strong. I don't think that the blower is strong enough to pull air from both vents at the same time with any kind of volume.
 
Similar to yours John, the galley one was never as strong as the head, but it was pulling some air, now not anything, like your I guess the good news, if I had my choice it would be pulling from where you most need it, the head!!!
 
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So I finally got to run my boat this weekend and it runs perfectly after changing out two spark plugs and their wires. Glad it was a simple fix; hope no other plugs/wires go out in the near future.

Unfortunately a new issue has surfaced. I can only start my starboard engine by pressing the "Emergency Start" button while starting the engine. The port engine starts no problem.

As you all know, there are 4 batteries in my setup. I am guessing one for each engine, one for the generator, and one for the house battery? Please correct me if I am wrong. They are all just over a year old.

I was told that perhaps my charger was bad. If so, how does one determine this? Is there a way perhaps that it was not wired correctly and was never charging that one battery that starts the starboard engine? How do you check a charger?

Or is it maybe just a low/weak battery that needs replacement? How does one go through the logical steps to single out the culprit in this matter?

Sorry if these are basic questions, but I am rather new to the charger/4 battery set up.

Thanks in advance for all your help!
 
My boat has two banks of 2 batteries each and one dedicated for the gen. Each bank is used for each engine starting. My charger has an LCD readout that cycles through showing the charge rate for each bank (my gen battery is not part of this charging circuit). If you have the same charger (Intelli-power) look to see it is putting out. if so move on to the batteries. You would need a meter to check the voltage at the batteries with charger on and with charger off to see if the charge is getting to the batteries. Of course when the engines are on the alternator is charging the batteries. One of those banks also provides voltage for your house items (frig., etc.) so you may having something drawing current and if you have your boat docked and not on shore power it may kill the one banks in time.
 
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ziekman@cox.net said:
Hello all - I have an issue with my "Power Vent" - there are 2 air intakes on board - 1 in the head, and 1 over the cooktop in the galley - the one in the galley has stopped working. When I turn the switch "on", the fan runs, and air is flowing into the vent in the head; the problem is air isn't going up the one in the galley. Any ideas/suggestions? I unscrewed the vent plate (4 screws), thinking i would see a motor, or something, but didn't see much except what appears to be some kind of ductwork...
Click to expand...

Hi Art,

Sorry to jump in here - as I am not a 330/350 owner, but I think our boats have similar hulls - at least the '08 350's do.

I just replaced my vent fan motor - it has a "Y" duct adapter on it and duct work that leads to the head and galley. There are 3 way switches in the galley and head to turn the motor ON and OFF. The motor is a Mayfair 5412, flange mount, and it is mounted against the hull on the port side mid-ship. On my boat, I have two "clamshells" on the hull there - the aft one is the central vac vent, the forward one is the vent fan "vent" (you can look at my sig picture and see the two clam shells just above the Sea Ray emblem). The vent fan motor is accessed via the port side cabinet at the foot of the couch/bed in the mid (aft) cabin, there is a window in the cabinet that allows viewing of the battery charger. If you unscrew the cabinet shelving and back wall, you can see the vent fan motor about 3' forward and 3' above the battery charger. Wasn't fun for an old guy to change, but with Aleve pre-treatment and tequila post-treatment, I survivded!!!

Sounds like you may have a switch problem rather than a fan motor problem...
 
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