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Posts: 158
Location: Burlington, WI | I have a '97 115 Merc 2 stroke, 4 cylinder. I was out this weekend and I was going as slow as I possible could for about 20 minutes when the low oil/over temp buzzer started going off. I checked the oil to make sure I had enough, and I had plenty of oil. So that wasn't the problem unless the engine wasn't getting oil for some reason. The engine was real hot, but the it was pumping water the entire time. Is it possible that going that slow for that amount of time at low RPMs that the engine just wasn't drawing up enough water to cool the engine. After it happened the first time we let the engine cool and then we cruised across the lake no problem, and the engine was fine out on the main lake as well. If the theory I already presented isn't the case then am I in some trouble.
Thanks
Greg |
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Posts: 1080
| When is the last time you had the impeller replaced? Even though you see water streaming through the motor....your impeller may be old and dry rotted and even be worn down and not pumping enough water.
Have you ever had the motor running shallow water that may have allowed the water intakes to have sucked up a bunch of muck and dirt to the point of potentially clogging some of the coolant passages and maybe even have some gunk stuck in the thermostates themselves preventing them from opening and closing properly?
Or...the oil pickup/sending unit may be going out.
Motors are too expensive to risk by continuing to run it. Get it checked out.
There's a lot of very knowledgeable people here on this board that may offer more assistance as well. Which...I'm sure they'll chime in once they see this thread.
Edited by MACK 5/12/2008 8:43 PM
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| I had the same thing happen on a '98 75 horse mercury. new impellar did the trick. even though the old impellar didn't look bad it was enough to make the warning go off. if you are a little bit mechanically inclined it is not a bad project to take on yourself. |
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Posts: 313
Location: On your favorite spot | yep - impeller - mine did the same thing last season and wouldn't piss this year when i started it. i didn't realize it until i got a new one, but the old impeller just wasn't pumping that much water, even though it still worked at any speed above idle.
Edited by Marc J 5/13/2008 11:32 AM
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Posts: 158
Location: Burlington, WI | Thanks fellas. I had a brand new water pump put in last year in the beginning of the season. Sometime in August I did run up a little too shallow and sucked up some junk where the engine stopped pumping water. I was able to put a piece of wire into the outtake and clear it out enough to pump water. I think I'll get it checked out like you guys mentioned. I'd rather pay for a new water pump instead of a new engine. Thanks again.
Greg |
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Posts: 576
Location: nappanee IN | hey greg, had a guy tell me to use a piece of heavy mono instead of wire so you don't scratch something inside your motor, goes around the bends too ..karol |
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Posts: 406
Location: Stones throw away...finally!! | I have a VMAX 225 and mine did the same thing this weekend at low RPM. I have always thought that it didn't look like it pissed a very healthy stream at low RPM's. I shut it down, let it sit for a few and started it back up. Everything was fine. At higher RPM's, there is no problem at all. Repair kit is pretty cheap in the grand scheme of things, roughly 60 bucks for the entire kit. I will be getting it done shortly. |
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Posts: 158
Location: Burlington, WI | Thanks guys. I actually already contacted my guy who does all the work on my engine. He's going to take a look at it here soon. Luckily I don't think this is too serious, and a new kit like you said (Marshall) isn't that expensive. |
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Posts: 227
Location: New Brighton, MN | This brings up a question -
What about older engines without temp gauges or warning lights/sounds? I have an old evinrude outboard, and I wouldn't know it is overheating until it is too late. Any warning signs or preventive maintenance to check on? or should I just make sure there's always a steady stream of water cooling the engine?  |
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Engine over heating