1997 225 s.l.o.w. problem?

M

mikesea

Lieutenant Commander
Joined
Oct 1, 2006
Messages
1,830
rigged 225 on my boat with vro disconnected,(pulled the amphenol connector,plugged oil line)enginge wont go above 2500 rpm and bucks.I see a red plug that is located on the electrical contact board on port side,it seems to be there to allow a disconnect of something?is this something I should be disconnecting.I have disconnected earlier VRO's from other engines ,but,this 225 seems to have other fetures I know nothing about,like SLOW MODE.Thanks for you help.Mike
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: 1997 225 s.l.o.w. problem?

S.L.O.W. Mode is a feature built into your powerpack that lowers the speed by shutting down half the cylinders. It is triggered by overheating, but also by lack of oil, fuel obstruction, shift assist switch, and other things.

Worse case is that your fuel/oil mix has not reached the engine and you are running on pure gasoline.

Best case is that you have not disconnected both sets of wires. One comes from the oil tank, the other runs from the pump to the main engine harness. Sometimes that disconnect is tucked/hidden behind the black box for the tilt/trim electronics.
 
R

R.Johnson

Rear Admiral
Joined
Sep 24, 2003
Messages
4,446
Re: 1997 225 s.l.o.w. problem?

If you are running on pre-mix fuel, there is no way raw fuel can reach the engine. Did the engine run alright before you disabled the oil pump?
 
E

ezeke

Supreme Mariner
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Sep 19, 2003
Messages
12,532
Re: 1997 225 s.l.o.w. problem?

"...there is no way raw fuel can reach the engine...."

It sounded as though you had just made the change-over, which is why I mentioned that the pre-mix may not have yet reached the engine.

Every set of instructions for changing is clear that you run the oil tank and premix together until you are sure that the premix has made it all the way to the engine, but that does not mean that everyone does it.
 
M

mikesea

Lieutenant Commander
Joined
Oct 1, 2006
Messages
1,830
Re: 1997 225 s.l.o.w. problem?

hey friends,thanks for replies.i found the port heat sensor was bad,did the ol disconnect til the heat horn didnbt sound,which BY THE wAY wasnt connected??I totally forgot back a few months ago I wrote about a constant heat horn and forgot all about it til I sat and thought about it.Sorry I didnt mention the heat horn earlier.A case of cant remember S....Thanks again
 
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