carb problems???

[caprisecca]

hello all I could use some expertise here. so my boat will run good for about 30 or 40 minutes. no problems what so ever. then it doesn't want to start. and when I finally get it to start it barely hits 2000 rpms. it sounds like it choking out. its left me stranded a couple times and is getting old. well last time I had it out and it was acting up, only running about 2k rpms I opened up the hood while it was running and almost instantly it opened back up and started running wide open. but as soon as I shut it it starts bogging back down again. well im not the most mechanically inclined but seems pretty clear to me that its not getting enough air.... another thing I noticed is there was what I thought much more water back there then what I thought there should of been. I also noticed that water was coming in through the pto shroud.... so sry about the long post but anyway will water in the engine bay cause the engine to choke out? the two air holes on the side didn't look obstructed.

 

[caprisecca]

also I just wanted to add that I just got both carbs completely cleaned and rebuild, with all new fuel lines, and new plugs too. it wouldn't run at all before this was done

 

[Dr Honda]

It's normal for the driveshaft seal to leak. It's how it stays cool. BUT... it shouldn't be excessive. So... an afternoon will let in a few gallons.

If the ports in the hull/hood are clear... then I'm going to say, you have an exhaust leak, and that's what's making the engines bog. Have you tried to drive with the deck lid open?

 

[caprisecca]

so with a exhaust leak will it start running fine then after a while bog? yes the air holes are clear so its not them. I did run it with the lid open and it started running fine until I closed it again. but its not very practical to drive around like that lol. my bilge pump don't work so I cant pump out water but would it help to turn on the blower to let out exhaust if that's it?

 

[rjcress]

my bilge pump don't work so I cant pump out water but would it help to turn on the blower to let out exhaust if that's it?

Given that the shaft seal leaks by design, I would think that a working bilge pump would be considered a critical item.
I wouldn't go out again until you have fixed that.

 

[john744]

From your description it seems that there is enough air in the engine compartment to run well when you first start out. As exhaust gases begin to build up in the engine compartment it reduces the amount of available oxygen for the engine to run properly. Running the blower will force air and exhaust gases out. This will also draw air in from the intake vent. Try it, what have got to lose............ Still, determine if you do have an exhaust leak and fix it. Exhaust gaes are nothing to fool with

 

[Dr Honda]

As above... drive with the fan running... that may help. But the way the ports are made... it should draw fresh air in.


FIX the bilge pump. You can buy a crappy pump from wall mart for $17, and it may just save your boat. Don't even bother to wire it into the auto switch. Just take the wires for the switch, and call it a day.