Bogging

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   I thought PCM recommended 89 octane or better in their engines.  I always just run 91 in my SAN, and 89 in the Mustang. probably doesn't make much of a difference.  

one observation I have made is that there seems to be a ton of problems that get guys to change the FCC filter frequently.  I have never run into this in 15 years and three boats, two carbed, one EFI. I replaced one on my first boat needlessly when I had a problem that turned out to be different. I don't think I do anything to prevent this other than running my boat low and filling frequently. For winter storage, I keep the tank full to the top. I used to use Stabil, but switched the Marvel the last couple years.

What causes this?  is it just crappy gas, and I am lucky? I do not fill at a marina, just from the local truck stop.

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WakeSlayer Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: March-15-2006 Location: United States Status: Offline Points: 2138	Post Options Post Reply Quote WakeSlayer Report Post Thanks(0) Quote Reply Topic: Bogging Posted: May-06-2009 at 4:21pm
	I thought PCM recommended 89 octane or better in their engines. I always just run 91 in my SAN, and 89 in the Mustang. probably doesn't make much of a difference. one observation I have made is that there seems to be a ton of problems that get guys to change the FCC filter frequently. I have never run into this in 15 years and three boats, two carbed, one EFI. I replaced one on my first boat needlessly when I had a problem that turned out to be different. I don't think I do anything to prevent this other than running my boat low and filling frequently. For winter storage, I keep the tank full to the top. I used to use Stabil, but switched the Marvel the last couple years. What causes this? is it just crappy gas, and I am lucky? I do not fill at a marina, just from the local truck stop.
	Mike N 1968 Mustang

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: May-06-2009 at 12:29pm
	I did but I had a pretty decent cam too, stock engine reg fine, HO premium gas.

gcarbone Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: October-13-2008 Location: United States Status: Offline Points: 95	Post Options Post Reply Quote gcarbone Report Post Thanks(0) Quote Reply Posted: May-06-2009 at 12:09pm
	i think I'll run some dry gas in the remainder of the tank in there now until its empty and make the changes. So you normally run high test all season long?
	96 SN

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: May-06-2009 at 12:04pm
	NAPA gold is a good choice, Doc prefers PCM labeled markups, there are others put it's not as much as an issue as an oil filter, Your just pulling the water out of the fuel mainly and depending on how full the tank was and where you bought your gas, marina's are nortorious for water in the fuel, there's going to be some traces of water in it first of the season and sta-bil's not going to fix that.

gcarbone Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: October-13-2008 Location: United States Status: Offline Points: 95	Post Options Post Reply Quote gcarbone Report Post Thanks(0) Quote Reply Posted: May-06-2009 at 12:19am
	Thanks for the input guys, do you guys run high test all the time or just to resolve an issue like this? I have run regular in my nautique since i got it. How does the fuel go bad over 5 months with stabil in it, or get water in it..condensation? will run dry, change the fuel filter and run high test. (any suggestions on a brand for the filter, does it matter?) I know you all frown on the Fram OIL filters.
	96 SN

316-Ryan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: March-31-2009 Location: United States Status: Offline Points: 45	Post Options Post Reply Quote 316-Ryan Report Post Thanks(0) Quote Reply Posted: May-05-2009 at 8:11pm
	Exactly what 79 said. This happened to me a couple of weeks ago. I was out for the first time, and it seemed for the first 15 minutes I couldn't get it to plane. When I'd throttle up it would start, then hick-up, and if I pulled the throttle back quick enough it'd stay running. Eventually, it started holding throttle... but yeah, ran her low on the old gas and on the way home put premium in it. Changed the fuel filter (mine had dirt in it), and it ran great in the driveway... albeit, I wasn't slamming the throttle.

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: May-05-2009 at 12:39pm
	water in the gas and old gas too. Run the tank dri replace the separator's filter and add some high octane fuel and call it a day.

gcarbone Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: October-13-2008 Location: United States Status: Offline Points: 95	Post Options Post Reply Quote gcarbone Report Post Thanks(0) Quote Reply Posted: May-05-2009 at 12:08pm
	anyone else have an idea?
	96 SN

gcarbone Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: October-13-2008 Location: United States Status: Offline Points: 95	Post Options Post Reply Quote gcarbone Report Post Thanks(0) Quote Reply Posted: May-04-2009 at 1:56am
	I dont think they fluctuated much and were where in a healthy range while this issue was happening. Unrelated (i think) but i had a temp problem earlier in the day when RWP belt slipped - I re-adjusted then i was fine.
	96 SN

Luchog Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135	Post Options Post Reply Quote Luchog Report Post Thanks(0) Quote Reply Posted: May-04-2009 at 1:39am
	check the fuel filter for any dirt, also could be a dirty injector? Did you watch the temp and oil pressure when you had the problem?
	1980 Ski Nautique Commander 351W

gcarbone Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: October-13-2008 Location: United States Status: Offline Points: 95	Post Options Post Reply Quote gcarbone Report Post Thanks(0) Quote Reply Posted: May-03-2009 at 11:43pm
	Hey guys I need your help.I have a 96 with the GT and is fuel injected. I Got it out for the first time this year today only to be bummed out because after running it for about 30 minutes at various speeds and no issues, it started to bog down when i reached 20mph+/- after taking off. As it bogged down, I would let off slightly and it would stop bogging some and I would actually pick up speed as it seemed to clean itself out...and then I could get my way up to full speed just fine if i wanted and it ran well. During this same time of the bogging down it did rev up and down slightly at just above headway speed... Starts and idles fine. Fuel Filter? Bad fuel? Sorry for being all over the place, i just want to give as much info about the symptoms that I can. If you need me to clarify just let me know. Thanks guys
	96 SN

Bogging

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