1997 Johnson 225 fuel restriction alarm.

[Reel Quick]

Colapsed fuel ball.Ok, let me tell you what I have done.Drained tank and its clean.Pulled PU tube,clean no screen or ball bearing.Removed the oil res and am mixing now.Replaced fuel water seperator,fuel filter in motor replaced.Primer ball replaced,flo scan clean.Vent clear.
I run the boat at 4500 rpms about 8 miles and the alarm will kick on and I back it down not wanting to run lean.Gets worse as the ride goes on.And back to the dock I go at 9 knots.
My next action will to replace every fuel line on the boat that have already been replaced.
Thanks.

 

[Dhadley]

Re: 1997 Johnson 225 fuel restriction alarm.

We're assuming the alarm shuts off as soon as you back off the throttle?

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

You are correct,I was told that the fuel pressure sensor was desighned to set alarm at 4 pounds before the ball goes flat?I had my brother give it a squeeze the first time this alarm went off,it went flat,this was back in July and I shut her down to low reve`s and have been limping back to the dock ever since.
It has been getting worse even with all the mods.
I`m starting to think that i might have a spongy fuel line that has broken down from the inside and is not in plane sight.Thank You for any help.Running out of ideas.

 

[Dhadley]

Re: 1997 Johnson 225 fuel restriction alarm.

A primer bulb going flat indicates the restriction is upstream of the bulb. Are you sure there is no anti-siphon valve?

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Positive,wasan`t looking forward to pulling up the floor,made sure it was clear.one other thing I could mention,changed prop size from 15 x17 to a 15x15.5 and reduced fuel burn from 22 gph to 11 gph at 4500 rpms.

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Pulled floor again and replaced every hose with a thicker 3\8 hose today.Blew out every hose,filter,vent,flo scan, and filter.
Bummer it was blowing 35 Knots.And i wasant going to re-slip by my self.Started right up.Stay tuned for next week.Thanks.The new hose was much more ridged than the old.It felt spongy.New stuff is doubled walled.

 

[dingbat]

Re: 1997 Johnson 225 fuel restriction alarm.

I had the same issue. Blew out everything. Replaced hoses, problem solved.
For good luck I removed the filter on the motor as well. No need for a second filter behind a 10 um Racor.

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Thanks,I hope that was the problem.I was also wondering about that secound filter before the pump.I figure the boat was built and the 10 micron fuel water seperator was added later.Bummer its still blowing 35.Will have to wait all week to find out if I solved the problem .

 

[w2much]

Re: 1997 Johnson 225 fuel restriction alarm.

Bring an extra tank and hose with you. That way you can assure youself of the tankside problem also two test in one day rather than wait another week to try something else should the need be there.

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

It`s on the list.Hate to pay some one for such a simple problem.Thanks.

 

[Dhadley]

Re: 1997 Johnson 225 fuel restriction alarm.

You are using the oil injection, right?

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Removed oil injection VRO.Capped off oil in at pump.
Replaced all fuel lines,Ran the boat to 25 knts, was running great no alarm!
Decided to push it after 3 miles out and she was warmed up,got to 29 knts and the alarm started to chrip.....DAM!
Seemed the warmer the motor got the worse the problem got as the day wore on.
Ran home at 22 knts.........WAY better then the 9 I got last week.
Didn`t bring an extra fuel can,and forgot to remove the 2and in line filter.
Still wondering about the fuel resrtiction sensor,Only thing I havent changed.
Where is it located and what does it look like?Cant find a picture.
Thanks for the help.Very frustrating..

 

[Dhadley]

Re: 1997 Johnson 225 fuel restriction alarm.

Keep in mind that without oil injection when you run lean on fuel you're running lean on oil. Just be very careful. The fuel restriction alarm is tied into the fuel line, it has nothing to do with the oil line (when using injection). In fact when using the injection and you get a fuel restriction the pump will send more oil to try to save the pistons.

Have you run the pressure and vacuume tests?

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

I have not performed any tests yet.Will be pulling in a couple of weeks and am going to let my guy do what he has to while he has it for some bus bar and wire clean up in the cabin.I have been running the fuel oil mixture x tra rich since this has started.I`m at my wits end over such a simple fuel problem.Thought of one other thing ....this motor is 225,it replaced a 200.
Now i`m just throwing darts?

 

[CapeHorn]

Re: 1997 Johnson 225 fuel restriction alarm.

I have had a similar problem with a '96 Johnson 175. Replaced some lines and fuel/water sep. No improvement. After working on it for a while today, I began to think it might be the vac sensor. I turned on the ignition without starting the engine. After self-check completed, the Check Engine light illuminated and remained on without the audible alarm sounding (except during self-check).

Have you checked the pressure in the fule line with a gauge?

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Do i put a Tee in line and check with a vacuume gauge?

 

[SKEETR]

Re: 1997 Johnson 225 fuel restriction alarm.

You should install an anti siphon valve as part of your fuel line upgrade. Hard to believe that boat is not a bear to start if it does not have one. They look like a standard threaded nipple and can be easily overlooked.

 

[Dhadley]

Re: 1997 Johnson 225 fuel restriction alarm.

I have been running the fuel oil mixture x tra rich since this has started.

If you have a fuel restriction and the oil is in the fuel and you're not using oil injection, you're not only running out of fuel but oil too. Be very careful.

 

[Reel Quick]

Re: 1997 Johnson 225 fuel restriction alarm.

Was told to remove the anti siphon.As the first cause of this PIA.Never had one!!!!!!!!!!!Thats why I tore the floor up again.
Sorry,back to how to check the vacume?
Have 3\8 copper ID...........Gonna by pass floscan,by pass,10 micron,bypass in line FF before the pump.
6 hose clamps.and a straight run to the tank.That will tell me one by one,easy to put back where the problem lie`s.
I think it`s the after market in line filter.But still waiting on the the location of the fuel resrtction sending unit?Only thing I havent done.
Its a BEAR TO START! AND WHEN IT DOES IT SMOKES OUT THE WHOLE MARINA!Decarbbed her every year,Seafoam.
PS,no litghts on this system.

 

[FAV453]

Re: 1997 Johnson 225 fuel restriction alarm.

I have the same motor (actually 2). Try a remote tank and see if you still have the same problem. I thought I had a restriction problem or a weak fuel pump so I troubled shot everything turned out to be low fuel and a bad gauge. BTW mine smoke pretty bad but when I ran on a remote tank the smoke almost all went away pointing to a problem with the something but I haven't found it yet.

One thing I am wondering is as someone stated do you really need 2 filters (spin on and the inline one)?