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#1
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Engine died down at high RPM.
I put the boat in this morning, took her out for a good run.It was going great for a while, but after I opened it up for a minute she died down from 4200 to like 2500, I thought it stalled out.
I threw it in neutral and saw it was still running so I threw it into gear and there she went. I kept it at low rpm heading back to port, the throttle seemed to be pushed farther down than usual, but the rpms stayed low. It idles fine, and starts right up,and all the plugs seem to be getting spark. I didn't open it up again because I didn't want to get stuck and have to call for a tow. I didn't run it last year, but I did drain all but 15 gallons of gas out of it last week,then added 10 gallons fresh gas ,oil,and sea foam. I just changed the thermostats also, the old ones were shot. I did notice that the 3 starboard plugs were really "wet" while the port plugs looked alost new. I hope it's a fuel issue or something managable, because I can't afford a new powerhead right now. It's a 1986 150 hp v6 Evinrude. Thanks.  
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#2
05-10-2008, 07:22 AM
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Checked the usual?
Bubble flat due to vent blockage or the like?
Fuel hose crimped? (this did happen to me once on another boat, the cooler was mashing the fuel line) Filter possibly almost stopped up? Don't like the sound of one side keeping the plugs wet.
__________________
 '75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#3
05-10-2008, 08:00 AM
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Thanks Tsubaki,I was just reading another thread at continuouswave, and fuel,water issue seem to give same almost the same syptoms for the bogging, which would make me happy.
I don't like the one side getting fouled up either.Any ideas on what may cause this?. I dread the thought that it may be the PH, and of course that's all I can think of right now. I did notice when I was draining the gas that I was seeing lots of air bubbles getting into my syphon tube.I had it connected to the gas inlet under the cowling.Is this normal?, it would bubble up so much it would stop the flow so I had to keep pressing the bubble the whole time. Last edited by mushman; 05-10-2008 at 08:13 AM.
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#4
05-10-2008, 08:13 AM
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I had the same thing happen to mine, low RPM's and wet plugs on one side. It was a power pack.
Mine was 86 175 so they are the same motor. Skools told me the deal at the time. I forgot how I tested it?? Or I just bought one and changed it? Well Therm, Spare, Skools, and the rest will be by soon to help. Good luck
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1986 V20  Old Fishermen never die, we just SMELL that way!!
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#5
05-10-2008, 08:41 AM
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Easy There
lets not go crazy thinking the worst
it sounds like a fuel problem to me do you have a fuel/water sepperator? if you do change it also check the vent line on the outside of the hull make sure its clean and open could also be an electric problem stator/switchbox oh wait i just remembered the switch box operates half of the plugs so went it cuts off it will shut them down causing half to get wet while its running bad be careful and pull 1 wire off hold it to the block and see if your getting spark then the other side if no spark the switch box is the culprit you didnt say what kind of engine you have i had the same problem with my merc but it was sounding the oil alarm it depends on what switch box is bad it would run great then throttle would cut to half speed with the oil alarm going off
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love to fish
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#6
05-10-2008, 08:43 AM
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a 150 evenrude i should have read to the bottom sorry but it can still be the same problem let us know there easy to change on a merc
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love to fish
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#7
05-10-2008, 08:51 AM
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Thank guys, It's a 1986 150hp 6 cyl Evinrude.I'd be happy with either the power pack (power pack looks to be just under 100)or switch(havn't looked that one up yet).
When I had the engine running at idle back at port I pulled each wire and I could hear the spark clicking and feel the engine bog.It would right itself once I plugged it back in. I never held it to the block though. Steplift, are you saying do them one at a time, disconnect then reconnect and move on, or disconnect one side leave it off then disconnect the other side?. Thanks again guys. 
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#8
05-10-2008, 09:01 AM
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I did the same now that I remember, while running pull the wire off one plug, then again on the other side, one side makes no difference then thats the bad side. and means the switch.
I did that to find out why my motor was not shutting down after I shut it off, the yellow & Black wire on the left side was not connected, I found the break and all was well again
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1986 V20 Old Fishermen never die, we just SMELL that way!!
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#9
05-10-2008, 09:07 AM
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Here are a few threads that were going at my time.
http://www.wellcraftv20.com/communit...ght=power+pack http://www.wellcraftv20.com/communit...ght=power+pack http://www.wellcraftv20.com/communit...ght=power+pack
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1986 V20 Old Fishermen never die, we just SMELL that way!!
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#10
05-10-2008, 09:18 AM
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We had a 115 do the same thing.
After a couple of weeks swapping powerpacks, unplugging plug wires, etc,etc, we found in a repair manuel somewhere how to test the powerpacks (gave resistance values). The powerpack did work but had weak values at high rpms when warmed up. Come to find out the first powerpack purchased was also bad, apparently someone used it, returned it and they resold it. Try the cheap and easy stuff first (might as well call it annual maintenance), plus it gives you a piece of mind.
__________________
'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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