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3.0 wont idle but runs great
On Jul 12, 4:29*am, "Steve" wrote:
my compression gauge only goes to 160. I pegged the gauge on each cylinder. |
3.0 wont idle but runs great
On Jul 12, 7:45*am, Tim wrote:
On Jul 12, 4:29*am, "Steve" wrote: my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve"Tim" wrote in message .... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Steve, I see you're much ahead of the game. did you try a different ignition coil?- Hide quoted text - - Show quoted text - Might help if you guys read the orginal post. He's got a 3.0l merc. That's an inboard 4 cylinder 4 stroke chevy. |
3.0 wont idle but runs great
On Jul 12, 6:52*am, jamesgangnc wrote:
On Jul 12, 7:45*am, Tim wrote: On Jul 12, 4:29*am, "Steve" wrote: my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve"Tim" wrote in message .... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Steve, I see you're much ahead of the game. did you try a different ignition coil?- Hide quoted text - - Show quoted text - Might help if you guys read the orginal post. *He's got a 3.0l merc. That's an inboard 4 cylinder 4 stroke chevy. Might help to understand I have one just like it in an '83 Chris Craft 169 Scorpion. What'd you think we were talking about man, a Port-Huron Steam engine? |
3.0 wont idle but runs great
On Jul 12, 7:12*am, TopBassDog wrote:
On Jul 12, 6:52*am, jamesgangnc wrote: On Jul 12, 7:45*am, Tim wrote: On Jul 12, 4:29*am, "Steve" wrote: my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve"Tim" wrote in message ... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Steve, I see you're much ahead of the game. did you try a different ignition coil?- Hide quoted text - I am fascinated that a small reciprocating engine can give such hassles. |
3.0 wont idle but runs great
On Jul 12, 5:29*am, "Steve" wrote:
my compression gauge only goes to 160. I pegged the gauge on each cylinder. |
3.0 wont idle but runs great
On Jul 12, 8:12*am, TopBassDog wrote:
On Jul 12, 6:52*am, jamesgangnc wrote: On Jul 12, 7:45*am, Tim wrote: On Jul 12, 4:29*am, "Steve" wrote: my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve"Tim" wrote in message ... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Steve, I see you're much ahead of the game. did you try a different ignition coil?- Hide quoted text - - Show quoted text - Might help if you guys read the orginal post. *He's got a 3.0l merc. That's an inboard 4 cylinder 4 stroke chevy. Might help to understand I have one just like it in an '83 Chris Craft 169 Scorpion. What'd you think we were talking about man, a Port-Huron Steam engine?- Hide quoted text - - Show quoted text - That was directed at the suggestion he might have reed valve problems. |
3.0 wont idle but runs great
In article c27f51d0-eafd-4859-a2dc-348fdb685468
@n35g2000yqf.googlegroups.com, says... On Jul 12, 7:45*am, Tim wrote: On Jul 12, 4:29*am, "Steve" wrote: my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve"Tim" wrote in message ... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Steve, I see you're much ahead of the game. did you try a different ignition coil?- Hide quoted text - - Show quoted text - Might help if you guys read the orginal post. He's got a 3.0l merc. That's an inboard 4 cylinder 4 stroke chevy. We read the origional post.... LAST WEEK!!! And I don't know a 3.01 merc from a Evenrude outboard. So, you are the mechanic, what do you think? -- Team Rowdy Mouse, Banned from the Mall for life! |
3.0 wont idle but runs great
On Jul 12, 10:04*am, I_am_Tosk
wrote: In article , says... my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) *SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could *the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve "Tim" wrote in message .... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Well, a compression test is great if the symptoms are happening when it's cold and you do the test, but in the case of a smoked valve, it can happen only when it gets hot (for now)... *I could be wrong but I think for the valves, you need to do a leak down test, and even then if the valve isn't hanging open cold, it won't show you much... -- Team Rowdy Mouse, Banned from the Mall for life!- Hide quoted text - - Show quoted text - You can do a compression test when it's hot and if the valves are not closing it will show a lower pressure. And it won't hold pressure nearly as well. To differentiate between valve problems and ring problems you squirt in a little oil before testing. Oil will improve low compression from bad rings but not from bad valves. I think he has gas problems though, not valve issues. If the valves were staying open it would also cause hard starting when hot. And it's a merc 3.0l not a 3.01. Which stands for 3.0 liters. That is a 4 cylinder inline chevy engine that's been around for a long time. You will find them and the 2.5l in all sorts of stuff besides boats. You won't get a ton power out of one but they are very reliable as a rule. I believe the volvo 3.0l is based on the same engine. Not to be confused with Mercs 4 cylinder "half of a ford cobrajet" engine. |
3.0 wont idle but runs great
"jamesgangnc" wrote in message ... On Jul 12, 10:04 am, I_am_Tosk wrote: In article , says... my compression gauge only goes to 160. I pegged the gauge on each cylinder. I started it last night, ran fine. It seems to do this only when it has below 1/2 tank. and after idleing for a while (over 10 minutes) SOOOO ???? Its in a Balyliner 175,year:2005. A couple of ideas that I want to throw out there . Is there a screen in the fuel pick up?, I already checked the gas tank vent, clear. Could the ignition module be funky, gets hot and retards the timing? I really dont want this one, can a bad flapper/shutter cause it, Thanks again. Sorry for the mindtwist Steve "Tim" wrote in message ... On Jul 11, 9:13 pm, I_am_Tosk wrote: In article d9767c46-043d-4627-83df-cf4287ca83b7 @d14g2000yqb.googlegroups.com, says... On Jul 11, 5:02 am, "Steve" wrote: Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It will run all day long, runs great, but at the end of the day, it refuses to idle, it just dies on me. Start it back up and it will run full throttle just fine, but try to idle and it dies. If I let it sit for a day or two, it goes back to running normal. So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel filter. checked for water in the gas, put another ingnition module in, replaced the coil. Im out of things to do. What am I missing? Thanks Steve --- Posted via news://freenews.netfront.net/ - Complaints to --- You might want to run a compression test to see if you have a burnt valve. My 140 would sort of do the same thing, but would run WO and pull the proverbial "4000 RPM", and there was no sign of water in the oil, but when idling back down it would cough, and die. it took some throttle work to get it over the dead spot but would seem to run fine. however, pulling a tube was a chore. a real loss of power. but w/o the extra drag, you couldn't tell it.Under investigation it had a blown head gasket and two exhaust valves burnt. Had the head checked out, replaced with all steel valves and a new gasket Runs great and hasn't stalled since. Yup, that's what I am thinkin'... -- Team Rowdy Mouse, Banned from the Mall for life! Yeah, Scott. I think his problem is'nt fuel delivery, but much deeper than that. --- Posted via news://freenews.netfront.net/ - Complaints to --- Well, a compression test is great if the symptoms are happening when it's cold and you do the test, but in the case of a smoked valve, it can happen only when it gets hot (for now)... I could be wrong but I think for the valves, you need to do a leak down test, and even then if the valve isn't hanging open cold, it won't show you much... -- Team Rowdy Mouse, Banned from the Mall for life!- Hide quoted text - - Show quoted text - You can do a compression test when it's hot and if the valves are not closing it will show a lower pressure. And it won't hold pressure nearly as well. To differentiate between valve problems and ring problems you squirt in a little oil before testing. Oil will improve low compression from bad rings but not from bad valves. I think he has gas problems though, not valve issues. If the valves were staying open it would also cause hard starting when hot. And it's a merc 3.0l not a 3.01. Which stands for 3.0 liters. That is a 4 cylinder inline chevy engine that's been around for a long time. You will find them and the 2.5l in all sorts of stuff besides boats. You won't get a ton power out of one but they are very reliable as a rule. I believe the volvo 3.0l is based on the same engine. Not to be confused with Mercs 4 cylinder "half of a ford cobrajet" engine. OK let me start over, It is the Chevy 3.0 litre engine.(4 stroke) alpha gen II outdrive. a 2005 to be exact. Symptoms: Will run great all day, when it gets to a half tank or at the end of the day, it will start and run fine, but when it idles for longer than 10 minutes, it will die. Then after it dies, it is VERY hard to start and will only stay running at over 2k rpm. go back to it in a day or so, it runs fine Things I have done so far Rebuilt the carb Rebuilt the fuelpump cleaned the plugs and distributor cap ( got to wait till payday for those items) put a different coil on it tried a different ignition module compression check= over 160psi each checked the timing (with module grounded according to the book) checked the tank vent (clear) verified spark at each plug The engine never gets real hot, Im lazy and never took the time to remove the rock that is stuck in my thermostat that prevents it from closing. Im wondering if maybe I have a busted exhaust shutter. I noticed that where the manifold and the down elbow meet that there is a line of rust going down the maniflold, but it does not leak. I am super anal retentive about this boat and know that I drained it last fall. Is it possible that part of the shutter is bouncing around in the exhaust tube, getting lodged in it at times, hit a wake and it bounces free? Thanks for all the help so far --- Posted via news://freenews.netfront.net/ - Complaints to --- |
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