Update "fixed.".92 Ocean runner 150 fuel restriction alarm

[Pst76]

I have a Johnson 150 oean runner that I have narrowed fuel issue to the motor somewhere. Was running fine until a few weeks back when Voltage Regulator cooked due to running tilt up to high from what I can tell in shallow water. Didn't get enough water up into the head from the way it happened.Tail was always in the water below inlet but running low rpm. I replaced regulator and motor seemed to start and run fine. After about 3 min running at idle on the muffs steady alarm sounded. I ruled out overheat by disconnecting sensors, alarm stayed on. Determined the the vacuum switch for fuel restriction is the source of the signal to the alarm by processs of elimination. Swapped internal tank with aux/portable tank hooked up direct to the motor bypassing water seperator etc. Same results. Once alarm sounds If I pump primer bulb (which is brand new as well as hose line) alarm goes of after one pump.Checked gas filter on intake looks fine nice and clean. Build pressure on bulb and see no leaks on hose fittings and bulb stays firm. Starts up first shot but after same period at Idle alarm goes off until one pump on the bulb to rebuild pressure. Any thoughts, Based on the manual I'm thinking somthing in the fuel module assy but up for suggestions.<br /><br />Sorry for the long post trying to detail as much as I can.<br /><br />Thanks

 

[Hooty]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Check the fuel quick disconnect at the hose end and the engine inlet. <br /><br />c/6<br />Hooty

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Thanks Hooty, The oil and gas line hook direct to the inlet tube on this motor. I replaced hose and also hooked aux spare tank direct as well with no quick disconnect as well. The thing that baffles is that I can squeeze the primer bulb as hard as possible and looking at all the hose connections there is no seeping of gas. Bulb stays rock hard until 2 or 3 minutes at Idle. On the inlet tube where the hose connects is there a diaphram maybe that could be bad. I looked in my manual and it shows the assembly needing to be removed to take the fuel module off but looks like just a splice block to connect internal hoses with external ones.

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Originally posted by Pst76:<br /> Thanks Hooty, The oil and gas line hook direct to the inlet tubes on this motor. No quick connector. I replaced hose and also hooked my aux spare tank direct to test as well also with no quick disconnect. The thing that baffles me is that I can squeeze the primer bulb as hard as possible and looking at all the hose connections there is no seeping of gas. Bulb stays rock hard until 2 or 3 minutes at Idle. <br />On the inlet tube where the hose connects is there a diaphram maybe that could be bad within that assembly. I looked in my manual and it shows the assembly needing to be removed to take the fuel module off but looks like just a splice block to connect internal hoses with external ones.

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

I'm at a loss on this one. I have checked all hose clips, and can still build pressure on primer bulb with motor off and I find no leaks and maintaining a solid squeeze on the bulb it does not soften as it would if I had a leak somewhere. Is there somthing in the fuel module,pump that could be the problem. I am getting oil thru the VRO as you can see it in the exhaust. It seems like once the pressure is on the bulb it will run forever if I continue to hit the primer bulb every few seconds. To me acting like a pump would suposed to do. I'm going to teat the fuel module apart this weekend but as a last resort. Any other suggestions would be great.<br /><br />Thanks

 

[Dhadley]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

It almost sounds like the pump is getting weak or the pulse line that operates the pump is sucking air or plugged partially.

 

[Walker]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Do you have an inline filter in the fuel line in the motor lower cowling. That's where I see most fuel restrictions.

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Dhadley, Thanks. Is the pulse sent from the same component that generates the pulse for the VRO?<br />Earlier in the season I had cleaned the small diaphram fitting that supplys the VRO pulse is it feeding fuel pulse as well. As far as the pump is it servicable (rebuild)or just a replacement?<br />Thanks

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

It does not seem to have one in line the only filter I can see is a cone shaped screen that is part of the fitting into the fuel. Gas line comes into casing, through fuel and oil fitting and right up to fuel module. Is there an additional filter that I can look for internally?

 

[outrigger]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Mine is doing the same thing after the same part replaced. VRO was removed from mine and there is no alarm. It will idel for a time seems fuel starved, one squeeze of the bulb and its back. Boat will run at 2400 rpms fine. You give it any more gas and it shakes and seems like it needs more gas..<br />Im at the moment the next post down<br />99 130

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

May be onto somthing, looking at my manual again and it shows a filter canister as part of the fuel module assembly. It is located below the VRO pump and horizontally to yje right side of the gas line inlet connection. The inlet assembly has a cone shaped screen that I have assumed to be the filter. Could that possibly be the culprit.

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

I am incorrect, cone assembly located where gas line connects is the filter. Canister looking thing I refered to is the fuel primer solenoid. Back to square one... Is there an easy way to confirm if pump is bad or good. I dont have a vac gauge to check pressure. Is there a basic test I can try.<br /><br />Thanks

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Question, Does the pulse limiter fitting provide vac signal for both fuel and oil or only fuel.Still trying to trouble shoot this thing.<br /><br />Thanks

 

[Dhadley]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

The pulse line provides the pulse (pressure and vacuume) for the pump. The pump moves both fuel and oil.

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

It seems to be pulling oil through Ok. Based on the exhaust smoke. As I lose fuel line pressure just before it stalls and I squeeze the fuel primer bulb I get more oil smoke in the exhaust. If thats the case should I be looking at the pump area. If the pulse limiter was not clear I would think oil feed would also be effected. Being the oil is thicker viscosity maybe just not dropping pressure as fast. I will clean pulse limiter first and then go from there. Are the pumps able to be rebuilt or just replaced?<br /><br />I'm hopin for finding a clogged pulse limiter.<br /><br />Thanks

 

[Pst76]

Re: Update "fixed.".92 Ocean runner 150 fuel restriction alarm

Success, I found the problem and resolved. Motor running like a top.<br /> Played around with every connection and clamp on the motor all seemed fine. Ran motor with primer being pumped and inspected visually inspected while using a small paint brush with a small amount of soapy water. Brushed bubbles around each connection and used flash light to watch.Bubbles work opposite and disappear as opposed to an airleak std test.Pulse line nipple was issue.<br />Found that from over time the innner most pulse line on the fuel module which attaches to a plastic tube that runs up to each carb on the each cylinder bank. The connection to the tube is via a plastic nipple that has 2 O-rings and inserts into the tube. a small plastic retainer then screws into the assembly to hold the nipple in place and then the hose is clamped to the nipple. The retaining clip had flexed enough that the outer o-ring was breaking the seal just enough to allow air to be drawn in. There was no sign of fuel around the connection but could watch it flex move as motor ran. Cleaned and replaced o-rings, reversed plastic clip to position flex direction toward tube connection. Ran motor at idle for about 30 min on muffs and took for a test on the water. All worked fine.