Stalling while in water.....running great in drive way....

ford84

Cadet
Joined
Feb 23, 2016
Messages
21
So bought the boat used from CL.....obviously bought someone else headache at this point. Replaced water pump, replaced thermostat, flushed the power head, all you guys helped greatly with the ordering of parts as I am new to this. So we got everything together, motor ran like a champ in the driveway idled with out a problem, throttled up with out a problem, and we even let it run for a little! Before I forget it is a '04 60 Tracker (Merc) ELTPO 2 Stroke.

We finally had a beautiful day where my buddy and I were both off of work so figured we would run it to a lake, drop it in, do a few runs, and do some fishing. Of course this was after we replaced the bunks on the trailer because one looked broke. Well good thing we did, one was broke, and they both just crumbled in our hands when we pulled them off! So....new water pump, new thermostat, motor flushed, new bunks.....LETS FISH...wrong. Put the boat in the water, fires up, bump in off the trailer, drop it in to reverse, stalls, starts back up, drop into forward get it over to the shore, stalls, can't get it restarted. Pull it out of the water and fuel is just pouring out of the carbs.

So we pulled the airbox, pulled the plugs, cleaned up all the dumped fuel, let it air out, put it back in the water and it wouldn't start, started it with the throttle open so we let it idle and warm up, and she ran great (in my opinion). Ran it for about 20-30 mins at about 3200RPM and then stopped to do some fishing. Went to start it back up.....fired up, stalled, fired up the second time but only with the throttle opened little bit. Let it warm up a little and then off we went. Got back to the ramp and then the fish and boat was there waiting for us, no tickets so thats a plus! Motor idled fine the entire time talking to the officer, no soon as he left we pushed off to put the boat on the trailer, stalled......WTF!!!

SINCE THIS HAPPENED.....heres my thinking....going to check the compression in all 3 cyc, new plugs on the way, carb rebuild kit on the way, new seals for the airbox to the carbs on the way, going to rebuild and clean all the carbs with a lot of carb cleaner, put them all back together, replace fuel filter (also question about that), and then take it to the local boat launch and dump it in the water and see how she does sitting on the trailer while in the water....not just with the muffs on.

Also have been tossing around the idea of a fuel/water separator, there is a inline fuel filter and I have read on a few of the parts sites that you shouldn't use a fuel/water separator with a inline fuel filter.....Leaves me to ask this, get read of the inline and put the separator in...OR...just use a dump chemicals for water in the fuel? Am I on the right page and in the headed in the right direction with the stalling problem?

Please and Thank You for the help in advance.
 

MH Hawker

Vice Admiral
Joined
Jul 13, 2011
Messages
5,516
I would guess its a carb adjustment, right now id bet its adjusted while running on muffs, it has no back pressure, adjust it while in the lake and it should be fine.
 

444

Senior Chief Petty Officer
Joined
Jul 16, 2010
Messages
704
Since you got stuff ordered already, here's what I'd do. Clean and rebuild the carbs, pay close attention to your installed float height. If your engine is anything like my much older engine, you really need to make sure you do a proper link and sync and I bet your problem goes away. When I bought my boat, the guy said the engine was running great until the lower end went out on it. I replaced the lower unit and dropped it into the water after it was running great on the muffs. She ran great until I tried to throttle up, then wouldn't do more than 2000 rpm. Problem went away after a link and sync.

I have the spin on water separator filter, works great. The water separators are a regular filter, setup in such a way as to allow the water to settle to the bottom. Running a second filter is redundant.
 
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