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Trouble shooting Mercury 1882 150 V-8
Trouble shooting Mercury 1882 150 V-8
Sounds like it isn't running on all cylinders, and power loss problem is getting worse. I check all my connections at the battery. I cut off all the battery connectors and soldered on new replacement ring terminals (+ & -) to make sure I wasn't having any bad ground issues there. It has new plugs, I did a compression check per the manual and I got 130-135 psi on all cylinders 6 cylinders. When I first noticed the problem it would lose power going down the lake. Now it sounds more like it is running most of the time on less than normal cylinders and occassionally starts firing on the rest for a few seconds. I didn't see a coil test procedure in my service manual. Would that be the next step? Or how how the control boxes? I believe it has the flywheel alternator ignition setup as described in my manula, but I have not pulled the flywheel to look. My fuel tanks are below deck and very difficult remove, or I would flush them out to make sure there is no water. I have new fuel line from the tank to the motor. I am just running on one tank for now until I get this figured out. I did order a water seperator for it which will arrive wednesday. I just don't feel like that is the problem since it has gotten progressively worse, and I have run a couple tanks of gas through it. It feels like ignition to me. What do I check next. -- Bob La Londe Yuma, Az http://yumabassman.4t.com |
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#2
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Oops - Menat to say V-6 not V-8
Trouble shooting Mercury 1882 150 V-6 not V-8
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#4
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Trouble shooting Mercury 1882 150 V-6
I just checked it idling in the driveway with my timing light. I had fire
on all 6. Same at 2000 and 3000 rpm. Didn't want to turn it any faster than that because my water hose didn't deliver enough water at 3000 to keep a steady stream of water and I don't want to risk overheating. I suppose I need to due the same thing under load on the water. That can be pretty tricky. I have a water seperator on the way. I think I'll go get a cheap universal electric fuel pump and pump all the gas out of the tanks and see if that helps at all. I guess I can go get a 6 gallon portable fuel tank and try that too as you suggest. When I was trying to figure this out before (when it wasn't as bad as it is now) somebody suggested a fuel additive called Dry Gas. I was not able to find anything like that on the internet. Is that for real? How can I check fuel flow in the carbs? Do I just have to pull them off and tear them down? "Clams Canino" wrote in message news  RGQa.62034$ye4.44104@sccrnsc01...And by the way - this is a big assumption. If you can get fire on all 6 while cranking it, and your stator ohms out OK, odds shift rapidly to fuel issues. Prolly a clogged carb jet etc. Borrow a 6 gallon "dummy can" and try that for a fuel source also to eliminate your entire tank system. -W "Clams Canino" wrote in message news:r8GQa.61960$Ph3.5781@sccrnsc04... We are assuming you are SURE your don't have a diry (clogged) carb or carbs. OK? |
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#5
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Trouble shooting Mercury 1882 150 V-6
I'd say that at this point in the game you outta tear the whole fuel suystem
down and clean / replace stuff yes. You can test if it's a *water in gas* issue with a fresh dummy can. Past that - it's time to pay the piper and tear 'em down. -W -- PLEASE NOTE: Email address change from to "Bob La Londe" wrote in message ... I just checked it idling in the driveway with my timing light. I had fire on all 6. Same at 2000 and 3000 rpm. Didn't want to turn it any faster than that because my water hose didn't deliver enough water at 3000 to keep a steady stream of water and I don't want to risk overheating. I suppose I need to due the same thing under load on the water. That can be pretty tricky. I have a water seperator on the way. I think I'll go get a cheap universal electric fuel pump and pump all the gas out of the tanks and see if that helps at all. I guess I can go get a 6 gallon portable fuel tank and try that too as you suggest. When I was trying to figure this out before (when it wasn't as bad as it is now) somebody suggested a fuel additive called Dry Gas. I was not able to find anything like that on the internet. Is that for real? How can I check fuel flow in the carbs? Do I just have to pull them off and tear them down? "Clams Canino" wrote in message news RGQa.62034$ye4.44104@sccrnsc01...And by the way - this is a big assumption. If you can get fire on all 6 while cranking it, and your stator ohms out OK, odds shift rapidly to fuel issues. Prolly a clogged carb jet etc. Borrow a 6 gallon "dummy can" and try that for a fuel source also to eliminate your entire tank system. -W "Clams Canino" wrote in message news:r8GQa.61960$Ph3.5781@sccrnsc04... We are assuming you are SURE your don't have a diry (clogged) carb or carbs. OK? |
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#6
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Trouble shooting Mercury 1882 150 V-6
On Mon, 14 Jul 2003 16:54:27 -0700, "Bob La Londe"
wrote: I just checked it idling in the driveway with my timing light. I had fire on all 6. Same at 2000 and 3000 rpm. Didn't want to turn it any faster than that because my water hose didn't deliver enough water at 3000 to keep a steady stream of water and I don't want to risk overheating. I suppose I need to due the same thing under load on the water. That can be pretty tricky. I have a water seperator on the way. I think I'll go get a cheap universal electric fuel pump and pump all the gas out of the tanks and see if that helps at all. I guess I can go get a 6 gallon portable fuel tank and try that too as you suggest. When I was trying to figure this out before (when it wasn't as bad as it is now) somebody suggested a fuel additive called Dry Gas. I was not able to find anything like that on the internet. Is that for real? How can I check fuel flow in the carbs? Do I just have to pull them off and tear them down? "Clams Canino" wrote in message news RGQa.62034$ye4.44104@sccrnsc01...And by the way - this is a big assumption. If you can get fire on all 6 while cranking it, and your stator ohms out OK, odds shift rapidly to fuel issues. Prolly a clogged carb jet etc. Borrow a 6 gallon "dummy can" and try that for a fuel source also to eliminate your entire tank system. -W "Clams Canino" wrote in message news:r8GQa.61960$Ph3.5781@sccrnsc04... We are assuming you are SURE your don't have a diry (clogged) carb or carbs. OK? Bob- hooking up a portable 6 gallon can will be "cheap insurance". If it runs OK, you know it's a fuel problem. If not, you know it's ignition or dirty carbs. I strongly suggest that you try the "6 gallon test". It could save you money. Also- yes, "dry gas" is a real product, available at any gas station. It will help remove water contamination in fuel, if used per instructions. Good luck. noah Courtesy of Lee Yeaton, See the boats of rec.boats www.TheBayGuide.com/rec.boats |
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#7
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Trouble shooting Mercury 1882 150 V-6
Don't you have any friends - with Mercs?
LOL -W "Bob La Londe" wrote in message news:bevmna$9bk0e$1@ID- I stopped by the local parts shop to get a gas can, and we got to talking about the symptoms. I think I may just have a pinhole getting bigger in my fuel pump diaphram. The rebuild kit is less than $10 so I went ahead and ordered one. Should be here in a couple days. Its real easy to check too. I can try it with an electric pump temporarily and see what happens. I'll keep you guys posted. Thanks for all the help. -- Bob La Londe Yuma, Az http://yumabassman.4t.com |
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#8
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Trouble shooting Mercury 1882 150 V-6
Heck, my dad probably has a half dozen gas cans I could have borrowed, but
I'm a do it now kinda guy and he lives 70miles away. Hell, he has a couple motors I could probably borrow. Besides I'm gonna want to have a couple 6 gallon tanks anyway when I get around to putting my 50HP force on my little skiff. Oh, you meant THOSE kind of friends. No I like all my friends better than that. LOL -- Bob La Londe Yuma, Az http://yumabassman.4t.com "Clams Canino" wrote in message news:rjJQa.62961$N7.8127@sccrnsc03... Don't you have any friends - with Mercs? LOL -W "Bob La Londe" wrote in message news:bevmna$9bk0e$1@ID- I stopped by the local parts shop to get a gas can, and we got to talking about the symptoms. I think I may just have a pinhole getting bigger in my fuel pump diaphram. The rebuild kit is less than $10 so I went ahead and ordered one. Should be here in a couple days. Its real easy to check too. I can try it with an electric pump temporarily and see what happens. I'll keep you guys posted. Thanks for all the help. -- Bob La Londe Yuma, Az http://yumabassman.4t.com |
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#9
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Trouble shooting Mercury 1882 150 V-6
Well, haven't gotten it out on the water, but I did find two or three
possible problems. I'm not certain that there was water in the fuel, but the boat HAD the old style open vents, and that boat takes a pretty big wave over the back deck if I come off plane to quickly. I replaced one vent so far with a new style vent that is not supposed to take in water unless you forced it in under pressure. I'll replace the vent on the other tank if I have time tommorrow. I added a Racor 2 micron filter and water seperator. Just in priming the filter witrh the prime pump I noticed a little garbage in the bowl. I tore down the fuel pump because a couple times it just sounded like it was running out of gas. I couldn't find any pinholes in the diaphram. Not even holding it up directly to the son. I did find somethign interesting though. The diagram return plunger was just floating around in the valve chamber of the pump. The spirng that pushes it out to push back the diaphram was missing and the plunger could easily have been obstructing the flow through one of the valves since the spring is supposed to hold it in place. I ordered a spring from Alsco Marine along with a couple other parts for the cowling. In the mean time I put the pump back together with out it. It pumps gas just fine so tommorrow. Ok, now for the driveway test. I ran it up to 4000 RPM in the driveway and it nevered reved like it was running out of gas, and it never died or spluttered. I ran it for a couple minutes at 1000, 2000, 3000, and 4000 rpm. It seemed to run great. I know that isn't the same as running under load, but it didn't run well even at 3000 rpm before. I might have some time to take it out and run it tommorrow afternoon if that storm that's coming in tonight blows through. -- Bob La Londe Yuma, Az http://yumabassman.4t.com "Bob La Londe" wrote in message ... Heck, my dad probably has a half dozen gas cans I could have borrowed, but I'm a do it now kinda guy and he lives 70miles away. Hell, he has a couple motors I could probably borrow. Besides I'm gonna want to have a couple 6 gallon tanks anyway when I get around to putting my 50HP force on my little skiff. Oh, you meant THOSE kind of friends. No I like all my friends better than that. LOL -- Bob La Londe Yuma, Az http://yumabassman.4t.com "Clams Canino" wrote in message news:rjJQa.62961$N7.8127@sccrnsc03... Don't you have any friends - with Mercs? LOL -W "Bob La Londe" wrote in message news:bevmna$9bk0e$1@ID- I stopped by the local parts shop to get a gas can, and we got to talking about the symptoms. I think I may just have a pinhole getting bigger in my fuel pump diaphram. The rebuild kit is less than $10 so I went ahead and ordered one. Should be here in a couple days. Its real easy to check too. I can try it with an electric pump temporarily and see what happens. I'll keep you guys posted. Thanks for all the help. -- Bob La Londe Yuma, Az http://yumabassman.4t.com |
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#10
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Trouble shooting Mercury 1882 150 V-6
On Thu, 17 Jul 2003 20:41:50 -0700, "Bob La Londe"
wrote: Well, haven't gotten it out on the water, but I did find two or three possible problems. I'm not certain that there was water in the fuel, but the boat HAD the old style open vents, and that boat takes a pretty big wave over the back deck if I come off plane to quickly. I replaced one vent so far with a new style vent that is not supposed to take in water unless you forced it in under pressure. I'll replace the vent on the other tank if I have time tommorrow. I added a Racor 2 micron filter and water seperator. Just in priming the filter witrh the prime pump I noticed a little garbage in the bowl. I tore down the fuel pump because a couple times it just sounded like it was running out of gas. I couldn't find any pinholes in the diaphram. Not even holding it up directly to the son. I did find somethign interesting though. The diagram return plunger was just floating around in the valve chamber of the pump. The spirng that pushes it out to push back the diaphram was missing and the plunger could easily have been obstructing the flow through one of the valves since the spring is supposed to hold it in place. I ordered a spring from Alsco Marine along with a couple other parts for the cowling. In the mean time I put the pump back together with out it. It pumps gas just fine so tommorrow. Ok, now for the driveway test. I ran it up to 4000 RPM in the driveway and it nevered reved like it was running out of gas, and it never died or spluttered. I ran it for a couple minutes at 1000, 2000, 3000, and 4000 rpm. It seemed to run great. I know that isn't the same as running under load, but it didn't run well even at 3000 rpm before. I might have some time to take it out and run it tommorrow afternoon if that storm that's coming in tonight blows through. ....sounds like progress.  )Good luck. noah Courtesy of Lee Yeaton, See the boats of rec.boats www.TheBayGuide.com/rec.boats |
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