86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Tried that, I flipped it over and the boat fired right up and stalled out. Would not restart. Flipped the switch back.<br /><br />If it were stuck wouldn't it still fire up then flood out??? I don't know too much about the operation of the primer.<br /><br />What if my keyswitch shorted out and constantly sent the "prime" signal to the motor? I think it would still fire up??...<br /><br />Mac

 

[angus63]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

If your primer was stuck open in the prime position, motor would start initially, but would be too rich to run for any length of time. After sitting for a while, it would start for a couple seconds but again be too rich to run. Sounds similar to your problem. Push key in and listen for solenoid click, release key and listen for solenoid release. You may need to disassemble to verify correct operation.<br />Good luck

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Update,<br /><br />I have found a cracked fuel line so I replaced all the lines under the hood.<br /><br />Found cracks in the fuel pump housing so I replaced the fuel pump.<br /><br />Now the engine will start and run for a bit if I feather the throttle and die in about 20 seconds. Very Smokey.. We may be on to something here…<br /><br />Angus, now it sounds abit like what you are saying. When I push in the key I hear a noise from the primer but I don’t know how to verify proper function. Can I bypass / shut off the primer?<br /><br />I am going to look at my manual and see what I can learn about the primer. <br /><br />I have to get this thing running before the hurricane sinks it! <br /><br />Mac

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

OK I unhooked the primer from the fuel distribution block and plugged both ends. Now the engine won’t fire or run. Hooked it back up and it will fire and run very rich for a bit then stall. <br /><br />What am I missing? Gas is in the carbs, I can see it flow out of the high-speed orifice when I goose the throttle when it is firing. <br /><br />Any ideas? Could I be missing a spark problem?<br /><br /><br />Mac

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Let’s review:<br /><br />Bought this boat ran fine on 2 test runs, and for 2 hours the next day until the hub spun. I used the manual trim release to raise the motor and put on the spare prop. Took it up on plane to test run and returned to the beach. I couldn’t get the motor to move back into the trim range with the manual release. But I figured that I could get home ok. Engine sat for 3hours and when I tried to start it wouldn’t run.<br /><br />What I have tried so far:<br />New plugs.<br />The engine will fire and run with a bit of pre-mix in the carbs so I went through the fuel system. Rebuilt carbs they were very clean and installed new kits. Replaced all fuel lines and under hood fuel filter. Found cracks in the fuel pump so I replaced the fuel / vro pump with a new Non VRO pump. I am running a remote tank with 50:1. I have good fuel pressure and gas in the bowls. Now the engine will fire and run for a bit and then stall. With carb silencer off I can see fuel flowing in to the engine though the high speed orifice in the center of the carbs. <br />On Angus’s advice I disconnected the primer and caped the fuel line. The engine wouldn’t fire with the primer disconnected.<br /><br />What am I missing? What do you pros think here? <br /><br />Mac

 

[Thompy_04]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

I have no idea if this has anything to do with your prob, but does you tank have a vent? If it does is it open? If no air can replace the fuel that is being taken out it will create a vaccume and not let fuel to the motor. To do a test crack the cap of the fuel tank, if you hear a "swoosh" that means air is entering the tank. If this works your vent is bad. Clean it out and you should be just fine.

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Thanks for the reply, I am using a 5 gallon jerry can 50:1 with the cap off up on the dock 2 feet above to make sure I have good fuel allready. <br /><br />Mac

 

[angus63]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Not sure anymore. If your lookin for a shot in the dark, I've read that the recirc valves can cause poor idle. They can be cleaned with alcohol. After starting, can you get up on plane and run without issue?

 

[Dhadley]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

When the engine does fire up with the premix, does it run smooth/correctly until it quits?

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Not really, I rev it up to around 3K and it is fine for 10 seconds then it starts to stumble like it is running out of gas, 10 more seconds then just dies out. <br /><br />Running very rich, smoke and littel spots of gas bubbling up afterwatrds.<br /><br /><br />Mac

 

[angus63]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Next time you get it running for 30 seconds or so, try spraying some ether (I know, I know, but once won't hurt!!) around the whole intake manifold, fuel pump, and anywhere else air could be pouring in this beast and see if the motor picks up. Also, since it seems as though you are loosing your prime after it runs, recheck the fuel lines from the pump to the bulb for cracks,leaks,etc.. real well. Sounds to me your bulb is filing the bowls but they are not being replenished.

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Humm, I'll try the ether but I can see fuel flowing out the High speed orfices when the engine is running. If I pull a hose off a carb there is plenty of fuel and pressure. Pump is brand new along with all fuel lines bulb ect.<br /><br />???????????????????<br /><br />Mac

 

[Pst76]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

May or may not help but no my 150 there is a pulse limiter which I believe works in conjunction with the fuel pump and the VRO. I cleaned mine when my VRO was questionable and it made a difference. When I was having a fuel restriction issue the question had come up about the limiter. Threads into the block. May be different on your 225. Just a thought. Good luck

 

[Pst76]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Just another thought I did to check pump. Pinch the gas line prior to the primer bulb. If pump is pulling pressure bulb should start to collapse once supply in bulb starts to run out. If not your getting air somewhere between there and pump if it is a new one.

 

[Walker]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Ether won't work like you want it to Angus. The fumes alone will make the motor run good and spraying it around the block sealing areas will most certainly get fumes up in front of the carbs.

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

I just noticed that my compression test results weren’t posted in this thread.<br />85, 85, 85, 79, 79, 85<br />Keep in mind that this info is from a cheap Harbor Freight gauge.<br />Mac

 

[james roach]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Sounds like you dont have spark on all cylinders. Check that and make sure that primer celenoid is pointed down.

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Primer lever is pointed down; I have even bypassed (Plugged the fuel tee and the input to the primer). With the primer disconnected it won’t fire. <br /><br />Spark on all plugs when held to block and cranking engine.<br /><br />Mac

 

[v12mac]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Guys, I am getting into big trouble with the wife! I have fixed / worked on all my buddies boats with Iboats and your help. The only way she let me buy this thing is that I told her I could fix just about anything on the boat. If I have to call a mechanic it goes up for sale and I have to sell the boat I have always wanted! 23’ Mako CC <br /><br />So for me, my marriage and above all my freekin’ pride. What am I missing on this???<br /><br /><br />Mac

 

[Reel Appeal]

Re: 86 Johnson 225 Troubble shooting, Fires revs dies FIXED!!!

Maybe I'm wrong but don't the compression numbers sound on the low side?Try pumping the primer bulb a little firmer.What spark plugs are you using and what condition?Are they wet/dry,oily,etc.?Clean or better yet replace the plugs(if fouled or old) with QL77JC4 Champions.