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1989 mercruiser 3.0 stalling after 30 min
1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall.
Are there any members out there that might have some insight into what the problem might be? |
1989 mercruiser 3.0 stalling after 30 min
"Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) |
1989 mercruiser 3.0 stalling after 30 min
On May 20, 7:52*pm, Rupp0003 wrote:
1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other *times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -- Rupp0003 www.marineengine.com Its free, and you wont have to put up with any of the ****tards in here. |
1989 mercruiser 3.0 stalling after 30 min
Eisboch wrote:
"Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) Yup. Same symptom as a bad stator on an outboard. |
1989 mercruiser 3.0 stalling after 30 min
On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote:
"Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. |
1989 mercruiser 3.0 stalling after 30 min
On 5/21/2013 8:41 PM, Wayne B wrote:
On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dripping fuel makes me think needle and seat or heavy float. |
1989 mercruiser 3.0 stalling after 30 min
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1989 mercruiser 3.0 stalling after 30 min
On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote:
On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. -- Hope you're having a great day! |
1989 mercruiser 3.0 stalling after 30 min
"John H" wrote in message ... On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. |
1989 mercruiser 3.0 stalling after 30 min
On Wed, 22 May 2013 10:10:56 -0400, "Eisboch" wrote:
"John H" wrote in message .. . On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. Both times mine went bad out in the middle of Chesapeake Bay. Boat started and ran fine - and then just seemed to bog down and die. That $100/year tow boat insurance was a good investment. John H. -- Hope you're having a great day! |
1989 mercruiser 3.0 stalling after 30 min
On 5/22/2013 10:10 AM, Eisboch wrote:
"John H" wrote in message ... On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. I wouldn't put money on any of the suggested diagnosis, including mine, but it would be worth checking out all of them. Most of the coil overheating problems show visual signs like bulging or oil under the high tension lead. Carrying a spare would be good insurance. |
1989 mercruiser 3.0 stalling after 30 min
On Wed, 22 May 2013 11:46:18 -0400, Hank©
wrote: I wouldn't put money on any of the suggested diagnosis, including mine, but it would be worth checking out all of them. Most of the coil overheating problems show visual signs like bulging or oil under the high tension lead. Carrying a spare would be good insurance. ====== The intermittent coil on my old 454 showed no external symptoms at all. The engine had failed several times previously after it had been run for a while but on the last occasion I was able to prove that there was no spark even though the coil primary showed that the voltage was being properly interrupted. |
1989 mercruiser 3.0 stalling after 30 min
"Hank©" wrote in message eb.com... On 5/22/2013 10:10 AM, Eisboch wrote: "John H" wrote in message ... On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. I wouldn't put money on any of the suggested diagnosis, including mine, but it would be worth checking out all of them. Most of the coil overheating problems show visual signs like bulging or oil under the high tension lead. Carrying a spare would be good insurance. ---------------------------------------- You're right of course but the OP's description of how the engine was acting sound VERY familiar. I was having the symptoms for a week or two (ran ok cold, started getting rough when warmed up and was very evident when I tried to push that tank of a boat up on a plane after being warmed up. I think you were still around here after the Boston Harbor experience. When it died that time, it blew the high tension wire right out of it's seat and indeed, there was oil on the coil. But, after it cooled down for a while, it worked enough to putt-putt back to Scituate. New coil fixed *that* problem and we moved onto the next one. That boat should have been retired from service years before. :-) |
1989 mercruiser 3.0 stalling after 30 min
All this is familiar to me as I had similar problems with the 25 hp Johnson on the Princecraft Yukon.
Screws had worked loose and tore up the stator. Since I wasn't using it for charging, I had the service tech remove the bad parts and the outboard worked perfectly until I traded the boat in a year ago. |
1989 mercruiser 3.0 stalling after 30 min
On 5/22/2013 5:20 PM, Eisboch wrote:
"Hank©" wrote in message eb.com... On 5/22/2013 10:10 AM, Eisboch wrote: "John H" wrote in message ... On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. I wouldn't put money on any of the suggested diagnosis, including mine, but it would be worth checking out all of them. Most of the coil overheating problems show visual signs like bulging or oil under the high tension lead. Carrying a spare would be good insurance. ---------------------------------------- You're right of course but the OP's description of how the engine was acting sound VERY familiar. I was having the symptoms for a week or two (ran ok cold, started getting rough when warmed up and was very evident when I tried to push that tank of a boat up on a plane after being warmed up. I think you were still around here after the Boston Harbor experience. When it died that time, it blew the high tension wire right out of it's seat and indeed, there was oil on the coil. But, after it cooled down for a while, it worked enough to putt-putt back to Scituate. New coil fixed *that* problem and we moved onto the next one. That boat should have been retired from service years before. :-) He had a symptom that you didn't have. Ask Harry if he went to the Navy Seal museum just down the street from the Disney resort he stayed at. They had some pretty interesting old boats on display. |
1989 mercruiser 3.0 stalling after 30 min
"Hank©" wrote in message b.com... On 5/22/2013 5:20 PM, Eisboch wrote: "Hank©" wrote in message eb.com... On 5/22/2013 10:10 AM, Eisboch wrote: "John H" wrote in message ... On Tue, 21 May 2013 20:41:39 -0400, Wayne B wrote: On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote: "Rupp0003" wrote in message ... 1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and stall. Are there any members out there that might have some insight into what the problem might be? -------------------------------------------------------------------- Bad coil. (Goes bad when warm .... ok when cold.) ==== Probably right. I had that problem on one of my old 454s. To make it worse, some genius decided that the coil should be mounted very near the exhaust manifold. The dummies who built my old Proline put the live well right above the coil, with no sealant. Took me two coils to figure out where the problem was. I think Eisboch nailed it. At the price of coils, it's well worth giving a replacement a try. John H. ---------------------------------------- Maybe. Educated guess due to similar experience. The fact that the OP says it runs fine at any speed for about half an hour makes me think it's probably not carburetor related. Sounds more like something heats up and fails which is more likely an ignition problem and the coil (especially if it's older) is suspect. Had the same thing happen one morning on the old '82 Century. Mrs.E. and I were taking a ride up to Boston Harbor from Scituate. It was probably just about in the same timeframe that the engine sputtered and died, right in the path of one of the Boston to Provincetown high speed boats that was just getting up on it's hydrofoils. It blew by us in a rush with it's horn blaring. After sitting dead in the water for a while the coil cooled off enough to restart the engine and we limped our way slowly back to Scituate at idle speed. I wouldn't put money on any of the suggested diagnosis, including mine, but it would be worth checking out all of them. Most of the coil overheating problems show visual signs like bulging or oil under the high tension lead. Carrying a spare would be good insurance. ---------------------------------------- You're right of course but the OP's description of how the engine was acting sound VERY familiar. I was having the symptoms for a week or two (ran ok cold, started getting rough when warmed up and was very evident when I tried to push that tank of a boat up on a plane after being warmed up. I think you were still around here after the Boston Harbor experience. When it died that time, it blew the high tension wire right out of it's seat and indeed, there was oil on the coil. But, after it cooled down for a while, it worked enough to putt-putt back to Scituate. New coil fixed *that* problem and we moved onto the next one. That boat should have been retired from service years before. :-) He had a symptom that you didn't have. Ask Harry if he went to the Navy Seal museum just down the street from the Disney resort he stayed at. They had some pretty interesting old boats on display. ----------------------------------------- You mean gas in the flame arrester? I don't remember it being like that but I *do* remember smelling gas due to the carb becoming flooded after several attempts to start it without success. That was before realizing the high tension wire had blown off the coil. |
1989 mercruiser 3.0 stalling after 30 min
I had the same problem with my '88 OMC Cobra, I changed the coil &
condenser, problem solved, has been fine ever since. Happy boating, Norm |
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