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merc 25 hp wont turn over

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DrakeKilla

New member
Hey new here - first post and of course its a problem :)

I've got a Merc '06 25 hp 4stroke efi w/ roughly 100 hours on it. I just did a fluid and filter change and wasnt paying very close attention - I had overfilled the engine oil and discovered this when I went to check the level, made a bit of a mess as it gushed back out the stick hole. I did get it drained back down and it is on the hashes of the stick now. Filter is in place and the lower unit oil was replaced. After some cleanup I hooked up the hose to run it for a bit and low and behold it wont start. (Was running just hours before i started the oil change). At first it started for 1-2 seconds, then quit. Now it just cranks but wont turn over. I trimed the motor level and let it sit over night so that any possible oil from the spill could drain. Level is now half way on the hash marks of the stick. I pulled all 3 plugs (they seemed dry to me) and gave them a good cleaning and reinstalled. Pulled the low pressure fuel filter and gave that a check, nothing of note there. put it back in and pumped the bulb and the fuel goes through easily. I checked around for any obvious loose connections, but find none. I imagine this is somehow related to my overfilling of the motor oil, but who knows. What to try next?
 
well, since i'm not that mechanically knowledgeable I'll just stick with layman terms so as not to confuse :)

I push the button and it sounds like its starting, or trying to start, but doesnt. If I keep pressing the button for a second or two, it will continue to do the same and the water will start to flow out the indicator, (very weak stream though), once I let off it stops. The indicator light is on (as is when normally starting), but no beeps or buzzes or non-normal noises that I've noticed....
 
Ok, so I just looked up the meaning of the term like I should have probably done the first time. It does "turn over" and then just cranks but does not start.
 
LOL - further reading makes the term completely unclear to me know. I'm just gonna say it doesnt start, shut my mouth, and wait for somebody that knows what they are talking about to chime in. Hopefully my previous descriptions of the problem makes it clear enough.
 
Well here's another piece of data I just discovered (maybe its a clue). I was just out in the garage and picked up the second bottle of oil. If I over-filled it wasnt by much. Sticker next to the fill cap says 1.8L, based on whats left in the second bottle thats just about what I put in it. So I guess the first question is why did it come gushing out when i pulled the dip stick (motor was level)? Could it be some kind of blockage somewhere, maybe trapped air causing a vacum effect of sorts not letting oil flow, ?
 
Try this turrn key on and have someone beside VST, and listen for high PSI fuel pump coming on.Better if you can get PSI fuel gauge and in stall on Schrader valve, get fuel psi (42.6psi)

Steve:eek::eek::eek:
 
I dont have a "key" (I can either push the button or pull the rope), once i start pushing the button, it cranks - I've tried listening for something, but cant really distinguish anything over the cranking. I'm in the process of trying to get a gauge to measure psi with on the valve. I did a comparison test today and it seems the problem is more than likely bad fuel. (Like I said previously it started right up and ran right before the oil change, but that was likely pumping all the bad fuel into it) What was in the tank was yellow and somewhat unclear and didnt have the same "strength" of smell as my control sample. I drained the tank and pumped the line dry with the primer bulb at the low pressure filter until i got nothing. Put about a gallon of fresh stuff in and pumped the bulb until it was tight. Still wont start. I've read some posts on here and maybe there is still some bad fuel in the "high pressure" filter area or pump. I'm not sure where the fule pump is in relation to the 2 filters, but I suppose that too could still have bad fuel stuck in there. Any way I can drain what comes after the low pressure filter?
 
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