It just quit---

[piperdriver]

Ok first I have a 1989 Johnson TJ110TLCEM. It is a 110 HP. It is attached to the back of a 1990 Tracker 24DL Pontoon. I was running across the lake at 5K RPM. Just as if I turned the ignition switch off if layed over. I reached for the throttle and retarded it to idle. the morot limped along at idle for a few seconds and then quit. I waited about a minute and fired it back up. Sounded good. Put it in gear and it ran back up to 5K. Just for a short time. Back down to idle again. After this routine went on for a few times I discovered that if I ran it part throttle at 3K RPM it would run fine and never quit. I replaced the fuel filter the fuel bulb to no help. I was a long way from home on vacation and I completed the vacation just running it at 3k. Ran all day like that. Never quit. My question---did I loose a fuel pump? It will run up to 5K plus RPM for a short time, less than a minute. While it is up there it sounds good. I currently have a 3 wire VRO system. I would like to maintain the VRO system. According to the Johnson IPC this (5007423) is the latest VRO pump for my engine. Is there any trick to replacing it? Anything that I should know before I tackle it? Am I on the right tack with thinking it is the pump? Also, The compression is good, and I have confirmed that it is not over heating, and there is enough smoke and oil useage that I am comfortable that it is getting oil. No alarms are going off. Any help would be greatly appreciated----Thanks,

 

[tashasdaddy]

Re: It just quit---

sounds like a fuel restriction problem. either the pump is not keeping up, air leak in fuel line, before pump. clogged vent on fuel tank. if the tank cannot get enough air, to replace the fuel being pumped. the tank becomes a vacuum. does it keep up if you have someone squeeze the fuel primer bulb.

 

[SparkieBoat]

Re: It just quit---

there is a rebuild kit for the fuel pump side of the vro here, http://www.maxrules.com/fixomcvro.html. you can try pumping the bubble while running..if this helps it is a good sign the pump is your problem. But be sure to check out everything Tash mentioned first.

 

[piperdriver]

Re: It just quit---

Pumping the bulb does not seem to have any effect. I thought of the fuel vent. I took the fuel cap off and same thing.

 

[piperdriver]

Re: It just quit---

If I decide to go with the rebuild kit---is that something that a do-it-your-selfer can tackle?

 

[SparkieBoat]

Re: It just quit---

I would think you should be able to handle it....check the fuel line connections at the tank and motor..i new fittings or a whole new fuel line..this is one of the most common fuel issue problem that I have seen...even seen the brass fitting on the tank be the issue..maybe change that out too.

 

[SparkieBoat]

Re: It just quit---

also check pick up tube going into tank.