185 Bogs and revs to only 3900 rpm-gctid821471

[jgutman79]

Hi Guys, first off want to thank you for taking a look at my post. Today I was out on my boat and long story short out of the whole it really bogged to get on plane, then when finally on plane would only top out at about 3700 to 3900 rpm. The boat first hesitated when it when to take off out of the whole then came back up on power but still bogged out of the hole. I'm a little miffed. I searched our forums for about 30 mins for this issue then just decided to post this instead. After I got off the water today I went and bought new plugs and installed them and also added a bottle of seafoam to the tank. I haven't run it since, but wondering if you have any other thoughts. Should I also replace fuel filter? If I should replace fuel filter can someone point me in the right direction on how to do it? Thanks J.J.!!! I added a pic to show what the plugs looked like after I pulled them out.

Specs, boat is a 2008 185 4.3 L. No mods to it. Prop is factory with 23p.


Attached files

[nighthawk73]

How old is the fuel in tank? when was last "non bog" use? carbed?

[jgutman79]

The last non bog use was a 3 weeks ago, last week it hesitated a couple of times and did bog once, however, rev'd out to 4800 rpms after a running the motor for a half hour or so and didn't hesitate or bog the rest of the day. Fuel is only about 3 weeks old. It is a carb'd motor.

[reefer]

I don't like Sea Foam...

Hows the fuel filters?

[RobMick]

My 2012, 185, 3.0 more hesitated than bog down. Started running with premium fuel, and fuel additive no problem

Since. as far as the rpm capped at 3900 .....please search my post of "dirty hull makes a difference". Same scenario...

[nighthawk73]

Alot of the times bogging issues are associated with fuel. could have been a bad batch of fuel, water could have inadvertently entered the fuel tank. fuel vent valve clogged, maybe not in this case but a free check doesn't hurt. If it were me I'd first check ignition base timing to rule that out. cgange fuel filters/water seperator, then proceed to drain the fuel, fill with premium.

[jgutman79]

I thought I would reply back with what I found out. I replaced the fuel water seperator and found no water in it. So then I proceeded to check the distributor. I found that it was corroded. I replaced the distributor and ran the boat for about 15 min. It ran up to about 4800 rpms but then backed down to about 4200 after another 5 min of running after the original 15 min. I adjusted the timing and it came back up to 4800 rpm. So problem solved.

[RobMick]

I think the combination of all that you did was the problem solver...I am not a mechanic by any means, but those plugs were downright nasty....so in essence you just about didma tune up to the boat except the carb.....maybe do that over winter and be a complete tune up at that point. With ALL my toys, I know many will say that plugs in a boat are like a car and they last for years, but for a couple buck each I will switch out plugs in my boat every year, and the 2-stroke stuff, jet skis, pontoon boat, etc I switch them out every other month...never have a problem