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Figure this one out....
I've been posting with this same problem all summer now.... My 1999 60
horse Johnson has had fuel starvation all summer. I first tried new diaphrams in the fuel pump $75. No fix. Then a new OMC line from tank to engine $40. No fix. Now I bought a new VRO pump $200. No fix. What's left? What am I missing? I miss having a boat that runs without having to pump by hand! Where should I look next? Could it even be the carbs? They were rebuilt this spring though. I'm hoping somehow to figure this out, the engine is next to useless until then. Thanks for any help!! |
Figure this one out....
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Figure this one out....
That's next I guess. I will get a new tank incase maybe it's clogged
screens or vent. I really hope that's what it is, since I have no clue where else to look beyond all that I've done already. |
Figure this one out....
You sure the advance is working OK?
wrote in message oups.com... That's next I guess. I will get a new tank incase maybe it's clogged screens or vent. I really hope that's what it is, since I have no clue where else to look beyond all that I've done already. |
Figure this one out....
I'm sorry, but, what's the advance? Something with timing? I had
checked the crankcase puls line at one point and it had good suction. Are there other adjustments I may need? The strange thing is that the engine ran fine until July. It's just struggling to get gas for some reason. |
Figure this one out....
I'm referring to advancing the timing of the sparkplug firing.
With the motor turned off, try pretending to give it full throttle. I'm not familiar with your motor but on everyone I've had anything to do with, you should see the guts of the magneto UNDER the flywheel rotate. If not, look for the connecting rod that might have dropped off. On cars etc it is usually vacuum controlled & not linkage drect from throttle. Sounds like yours is OK on idle but not advancing on higher revs. Ofcourse it might be vent blocked in cap like other comment. Try it with the lid off the tank? I also have seen outboards come out of the factory with high altitude jets instead of low altitude ones causing similar symptoms as yours. wrote in message ups.com... I'm sorry, but, what's the advance? Something with timing? I had checked the crankcase puls line at one point and it had good suction. Are there other adjustments I may need? The strange thing is that the engine ran fine until July. It's just struggling to get gas for some reason. |
Figure this one out....
On Aug 27, 10:18 pm, wrote:
I'm sorry, but, what's the advance? Something with timing? I had checked the crankcase puls line at one point and it had good suction. Are there other adjustments I may need? The strange thing is that the engine ran fine until July. It's just struggling to get gas for some reason. If you can get the engine to run up to its rated RPM under load (in gear) by pumping the primer bulb, the problem is fuel-system-related and NOT THE IGNITION. When you have an engine starved for fuel, if the obvious stuff (closed vent, clogged filter) is not the cause, then divide and conquer. Use a portable tank and hose KNOWN to work on another engine. If the engine runs fine with these, then you know that the problem is in your built- in tank and/or its associated hose, and you just saved yourself multiple $$$ "shotgunning" every fuel-related component on the outboard till you finally turn to the stuff on the boat which may have been the actual cause all along. If you think your hose is bad, try it on another engine, of approximately equal size if possible. (Of course, don't run straight gas through a motor that requires oil/gas premix; the hose from your VRO-equipped engine will need to be flushed with premix if you use it on a premix motor.) The symptoms will appear on the other engine if the hose itself is the cause. If the other engine runs fine with your hose, then it's probable that you can move the hose way down on the suspect list. Even though you have done some work and replaced some parts already, there are multiple components on the boat and motor that you haven't yet addressed. The portable tank test should still be performed. Then get back to us. Till you do, best we can do is simply list every component in the system and cross off the ones you've already replaced, assuming the replacements are good (and we all know what ASSuming leads to). %mod% |
Figure this one out....
wrote in message ups.com... I've been posting with this same problem all summer now.... My 1999 60 horse Johnson has had fuel starvation all summer. I first tried new diaphrams in the fuel pump $75. No fix. Then a new OMC line from tank to engine $40. No fix. Now I bought a new VRO pump $200. No fix. What's left? What am I missing? I miss having a boat that runs without having to pump by hand! Where should I look next? Could it even be the carbs? They were rebuilt this spring though. I'm hoping somehow to figure this out, the engine is next to useless until then. Thanks for any help!! Have you tried changing the primer bulb? |
Figure this one out....
"Rom" wrote in message news:vt0Bi.20$Yg.9@trnddc02... wrote in message ups.com... I've been posting with this same problem all summer now.... My 1999 60 horse Johnson has had fuel starvation all summer. I first tried new diaphrams in the fuel pump $75. No fix. Then a new OMC line from tank to engine $40. No fix. Now I bought a new VRO pump $200. No fix. What's left? What am I missing? I miss having a boat that runs without having to pump by hand! Where should I look next? Could it even be the carbs? They were rebuilt this spring though. I'm hoping somehow to figure this out, the engine is next to useless until then. Thanks for any help!! Have you tried changing the primer bulb? Also, check the vacuum line from the block to the fuel pump- could be blocked. |
Figure this one out....
I've bought a new bulb. When I squeeze it, it will collapse. I think I
may check the fuel filter. It was new this spring, but maybe it's got enough of a clog that the pump can't keep up. When I pump it by hand, the engine runs great, up to 5500 rpm or so. I have even tried all new lines from inlet to pump, to pulse, to filter and to carbs, but no help. I'm hoping I've narrowed it down to the tank or the fuel filter. It's even hard for me to pump by hand, maybe that means there is a blockage somewhere. Could it even be the inlet fitting on the motor? I'll be testing and troubleshooting some more tomorrow. |
Figure this one out....
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Figure this one out....
Tried again today. I can pump it by hand, but after a couple hours of
use, it doesn't seem to help. I'm wondering if it gets worse after it warms up. It's a steady stop and go cycle, a little gas, then bog, then gas, then bog... What if... The fuel pump and delivery is working, but gas is being stopped after the fuel pump? How and where might this happen? I'm about ready to just drop it off at a Marina.... Just can't seem to isolate the problem. |
Figure this one out....
What can anyone tell me about "Timer base linkage"? I was reading
other related posts ( seems 1000's have had this same problem! ) and someone said to check the timer base linkage. I can idle all day long and it gets fuel, but will die at WOT unless I pump by hand. I almost think that the pulse isn't strong enough. Next will be all new lines from fuel pump to carbs. That's all that's left now to try... |
Figure this one out....
Jarrod, Have you tried ANY of the suggestions?
Did you borrow a complete fuel tank & fuelhose assembly & try it? Where the fuel line connects to the engine block/fuel pump there usually is a strainer/filter there. On a small old Chrysler it is one screw in the centre to access & clean it. PLEASE try to eliminate one of the possiblilities at a time........ it's the only foolproof way. If you have an older type fuel tank you can also check the filter on the end of the pickup pipe inside the tank. "Timer baselinkage"? .......... Did you look to see if the spark generating assembly advances with throttle opening? Are you indeed serious about solving this problem or just having a game with us? wrote in message ups.com... What can anyone tell me about "Timer base linkage"? I was reading other related posts ( seems 1000's have had this same problem! ) and someone said to check the timer base linkage. I can idle all day long and it gets fuel, but will die at WOT unless I pump by hand. I almost think that the pulse isn't strong enough. Next will be all new lines from fuel pump to carbs. That's all that's left now to try... |
Figure this one out....
wow... no games. I'd much rather be boating for what's left of the
summer than playing games. Here's where I'm at: · New OMC bulb/assembly · New fuel filter · New VRO pump with VRO inlet capped · New 6 Gallon Tank * I also tried all new lines to the fuel pump, but no difference. **** The Bulb does not collapse. I think I said when I pump it by hand, I can squeeze it till it's flat. This allows me to run at full throttle. It must be a blockage or restriction either before or after the fuel pump. I guess it can't be timing, since it ran well earlier this summer. It runs smooth and fast when I pump by hand, but when i's hot out and everything is hot, it's hard to pump even by hand. I see that so many people have had this same issue, but noone ever posts the followups. |
Figure this one out....
On Fri, 31 Aug 2007 08:37:24 -0700, wrote:
**** The Bulb does not collapse. I think I said when I pump it by hand, I can squeeze it till it's flat D'Oh!! That's collapse. |
Figure this one out....
"Short Wave Sportfishing" wrote in message ... On Fri, 31 Aug 2007 08:37:24 -0700, wrote: **** The Bulb does not collapse. I think I said when I pump it by hand, I can squeeze it till it's flat D'Oh!! That's collapse. You gotta pump that ball until it stays up & firm........ |
Figure this one out....
Yes, but the bulb won't go flat on it's own.
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Figure this one out....
On Fri, 31 Aug 2007 16:39:38 -0300, "Don White"
wrote: "Short Wave Sportfishing" wrote in message .. . On Fri, 31 Aug 2007 08:37:24 -0700, wrote: **** The Bulb does not collapse. I think I said when I pump it by hand, I can squeeze it till it's flat D'Oh!! That's collapse. You gotta pump that ball until it stays up & firm........ Pump it until *what* stays up & firm??? :) -- ***** Hope your day is better than decent! ***** John H |
Figure this one out....
Don White wrote:
"Short Wave Sportfishing" wrote in message ... On Fri, 31 Aug 2007 08:37:24 -0700, wrote: **** The Bulb does not collapse. I think I said when I pump it by hand, I can squeeze it till it's flat D'Oh!! That's collapse. You gotta pump that ball until it stays up & firm........ It shouldn't require all of that pumping and his obviously isn't working correctly. He has a problem with the vent or something like the filter on the other end of the line. |
Figure this one out....
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Figure this one out....
Today I took off the hose assemble that goes from fuel pump to carbs.
It's hard for me to blow through it, I think it may have restriction. I also noticed something else that may be strange. When I put the motor in reverse today, it seemed to rev more than in forward. That may be just the gearing, not sure though. If it does get gas better in reverse, I should look for a linkage problem? |
Figure this one out....
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Figure this one out....
That's what I thought. I think it's safe to say it's narrowed down to
between the fuel pump and carbs. I have plenty of pressure on the pulse fitting, new fuel pump, new lines and tank, so I'm hoping I get this fixed this week!! |
Figure this one out....
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Figure this one out....
Just got off the lake.. Running better than it ever did since I've
owned it!! This is a 1999 which has sat since 2000 and I bought the boat this last winter. All this after redoing lines, tanks and a new fuel pump!!! I had just started into taking apart the carbs and found that the needle seat on the top carb wasn't tight and the needle was jammed, preventing any gas from getting into the top carb. Having one not work means there's less power fro the fuel pump too. I found the high speed jet, right inside the bottom of the emulsion tube orifice. Cleaned them with a guitar string, but they seemed fine. While I was at it, I put in a new fuel filter and redid the nylon cable ties with new ones and went with hose clamps where there was room. I can push 6000rpm now and it's smooth all through the throttle. It's nice to have a useable boat again, I lost a good month and a half of boating due to all this. I wouldn't have thought it would be the carbs, it was the last thing on my list to check over, since when I pumped by hand it ran. I thing the extra pressure of pumping by hand was forcing some fuel into them, but still not enough. Anyway, running like a top now, thanks everyone for helping, I should still get some good run time in! |
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