93 Evinrude 150 Spitfire bogs down with constant alarm

I have a 93 Evinrude that bogs down when a constant alarm goes off, I know it does it to protect the motor. The motor is not overheating and I replaced the thermostats about 6 months ago; it has a good pee stream and is not hot. It wasn't doing this before I replaced the VRO 2 days ago. The motor use to be hesitant when throttled up and the oil alarm would go off, the new VRO has fixed that problem; now it gets up on a plane with no problem, but after about 1 minute the alarm goes off and it revs down and the motor starts shaking like crazy!!! My understanding is that the constant alarm is for overheating and for fuel restriction? I unplugged the Vacuum switch and the alarm was still sounding!! If I shut the motor off and wait 30 seconds, I can run full throttle for a minute until the alarm goes off again!! Any help would be greatly appreciated!!! The motor is a 93 Spitfire E150ELETG

Re: 93 Evinrude 150 Spitfire bogs down with constant alarm

From your description it sounds like it's overheating and going into SLOW.

Re: 93 Evinrude 150 Spitfire bogs down with constant alarm

boobie said:

From your description it sounds like it's overheating and going into SLOW.

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It is going into SLOW but it's not overheating. I think I'm going to take it out tomorrow and unplug the thermostats to see if one of them have gone bad. I ordered a Vacuum Switch and I should get it tomorrow. I'm also going to bring a portable tank with a separate fuel line so I will know it's something in the motor. From what I've been reading it only does a constant beep from over heating or from a fuel restriction. Hopefully I figure it out before the 4th!!!!
:facepalm:

Re: 93 Evinrude 150 Spitfire bogs down with constant alarm

A fuel restriction will not put it into SLOW.

Re: 93 Evinrude 150 Spitfire bogs down with constant alarm

I also thought a fuel restriction alarm wouldn't trigger SLOW mode (at work now, can't check my service manual).

I started a thread yesterday, I have a very similar problem on a 94 Ocean Runner. Did you ever resolve your problem?