95 Evninrude 90HP Random oil alarm - power loss

ThePerchik

Seaman Apprentice
Joined
Mar 27, 2008
Messages
36
Hi All,

Wanted to say you are all the best, i have learned so much by lurking on this forum.

We purchased a 1985 17' Thundercraft Bowrider with a 1995 Evinrude 90HP outboard this past sept. The boat is in good shape other than the seats.

All was well until the last few times we went out last season in late October. The no oil alarm went off occasionaly and pumping the oil line primer would solve the problem. This would happen randomly, maybe once or twice a 2 hour trip, sometimes in a no-wake zone and sometimes when flying around at 25 knots on a plane. We took a look at found that the clamps on that were on the oil line around the bulb were loose. We swapped them out and on our last outing it happened once (which we attributed to a bubble in the oil line since it happned in the start) and that was it. We went out a few times this season and nothing at all. I was very stress free, it started on the first crank after we took it out of storage.

Now the drama.....we took it out this past weekend and on our return trip we were already inside the markers to enter our channel and head to the marina. We were maybe a 100 yards from the no wake zone and we bounced a bit hard over some wake of a boat coming out (much larger than ours). I couldnt really slow down because that boat was way too close and squeezing us and one was behind us. Outside the channel it gets really shallow FAST. At the point the boat lost a TON of power. Just went to slightly above planing speed but I did not touch the throttle. I throttled back, then to neutral and then back into gear and tried to speed up and nothing... still almost no power. My cousin pumped theprimer bulb on the fuel line. He said the bulb was soft. It gave it some gas and it went. We replaced teh clamps on the fuel line when we did the oil line just in case as well. By now we were in the no wake zone and went slowly. Then the all too familiar oil alarm went off. Short beebs every 2-3 seconds and a sticker on the hull says that means no oil. Cousin touched the oil bulb, as usual it was rock hard. After a few seconds it stopped.

When we came to shore i checked the oil line and it looked fine, no leaks anywhere, all clamps tight. No fuel smell anywhere and couldnt see any leaks. The tank is in the bow so i couldnt trace it all the way there....

Is this a sign that the pump is starting to poop out? Any ideas would be really appreciated. We have a BIG vacation planned on Lake George and i would want the boat to be in shape for the trip.

Thank you all.
-Paul
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: 95 Evninrude 90HP Random oil alarm - power loss

If you check your owner's manual, you may find the engine is equipped with the "SLOW" system. This system will cause the power pack to limit rpm's to 2500 when it senses certain problems-to keep from damaging the engine. Can be either an overheat or a fuel delivery problem-but should be accompanied by a horn warning. The beeps you indicate should be from a fuel pump problem. You need the factory service manual and vacuum gauge in order to troubleshoot the pump. You may want to see your local dealer to make sure you enjoy the vacation.
 

ThePerchik

Seaman Apprentice
Joined
Mar 27, 2008
Messages
36
Re: 95 Evninrude 90HP Random oil alarm - power loss

Ok, great thanks. I have an appointment next week to drop it off. I will keep all updated. Thanks for the info.
 

ThePerchik

Seaman Apprentice
Joined
Mar 27, 2008
Messages
36
Re: 95 Evninrude 90HP Random oil alarm - power loss

Well got her back from the mechanic. He said that the VRO pump was hardly outputting enough oil to keep the alarm silent and was close to failure. Took her out today in Barnegat Bay and had a blast without a peep from the horribly loud alarm.
 
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