My spark plugs are wet

[UNCC Grad]

Re: My spark plugs are wet

Yes, same problem. Will start and idle fine, and runs fine up to about half throttle. When you hammer down to get up on plane, it sounds as if it's either not getting fuel correctly or it's not hitting on a cylinders. Compression checked out fine, 125, 126, 126, 121 and I changed plugs, which helped a little. <br /><br />I am barely able to get the 16' welded aluminum boat on plane, whereas before I was getting low 30's with it.<br /><br />As far as the oil is concerned, I used Penzoil TCW-3, so I don't think it would cause problems. I've heard it could be a stuck needle on the carb, busted diaphram on the fuel pump, bad switchbox, bad stator, bad coil, etc., but right now I am trying to go through the cheap stuff like fuel delivery. My plugs are as yours are, wet with fuel/oil mix.

 

[kentfa]

Re: My spark plugs are wet

i have not checked the compression. <br />i think maybe my carburettors overflows, becouse it seams like it flows out fuel from the carbs, but maybe its suppose to do that when the motor is tiltet all the way up.<br /><br />iv got a tip from a friend who is working with motors, that i shold try to drive with wot, and spray some start-gas into one carb, and if it increase in rpm the motor get to little fuel. if it slows down it gets enough fuel. is this correct? anyone tryed this?

 

[quantumleap]

Re: My spark plugs are wet

Hey Lube- I guess I misunderstood what he was trying to convey to Bobbo. I wasn't trying to light the oil fire again. I also feel you need to take achris' opinion for what it's worth, keeping in mind he is located in Australia. There may be a greater variance of quality of oil there, or...<br /><br /><br />...perhaps you are correct in your lack of trust in all TCW3 rated oils.<br /><br />

 

[achris]

Re: My spark plugs are wet

QuantumLeap,<br /><br />FWIW. Merc's TCW3 oil exceeds the TCW4 rating. I believe that all oils rated TCW3 are TCW3, just that some are better than others. I was initially swayed to the Merc brand because of a test of several different brands by a very highly respected boating mag in the mid 90's. And then by seeing the insides of several hundred engines.<br /><br />Chris............

 

[LubeDude]

Re: My spark plugs are wet

Originally posted by Quantumleap:<br /><br />...perhaps you are correct in your lack of trust in all TCW3 rated oils.

I made an earlier post, and after rereading it, I may have assumed you were making a wise comment instead of actually maybe agreeing with me.<br /><br />So, am I to assume you think I may be correct in not trusting all TC-W3 oils, or were you in fact making a jest as to me not trusting any TC-W3 oils?<br /><br />If the first, I apoligise for the previous statement. I guess I have become a bit touchy!

 

[BillP]

Re: My spark plugs are wet

Originally posted by Bobbo:<br /> <br />my plugs are buhw2, the one that sat in, but it maybe just Buhw that is the original. not sure if it is hotter.<br /><br />

Those sound like NGK plugs. Their heat range is opposite from the way Champion rates plugs. NGKs get colder as the number gets higher. Buhw is hotter than Buhw2...change back to Buhw plugs and see what happens. Check them after 30 mins of fast running to see whats up.

 

[quantumleap]

Re: My spark plugs are wet

LubeDude, let me put it this way, just as in auto oils I won't use some unheard-of brand just because it is appropriately rated.

 

[LubeDude]

Re: My spark plugs are wet

Originally posted by Quantumleap:<br /> LubeDude, let me put it this way, just as in auto oils I won't use some unheard-of brand just because it is appropriately rated.

Glad I eddited my post, we would have been at it again and it would have been my fault.!!

 

[natedennis]

Re: My spark plugs are wet

likly problem with carborator.. get a rebuild kit. their pretty cheap. if your air fuel ratio gets off then you can have this problem. ie.. to much fuel and no air to burn it with. i think i missed the model some where in the oil of the topic. if it has an air filter, intake that needs cleaning, clean it. make sure that your choke is opening correctly. not to insult you, but make sure that you didnt somehow manage to get twice the oil in the gas if this is a 2 stroke.<br />this is where i would start,, not so much with the oil. wear normally happens over long periods of time. if your compression is good, switch brands if you want but gasoline and O2 is what causes the explosion. make sure you have both or it will past right through your cylinder coating your plugs on the way out.<br />good luck

 

[achris]

Re: My spark plugs are wet

OK. Let's get back to some of Bobbo's comments. The spark plugs you're talking about don't have a heat range. They are surface gap plugs. If the correct plugs are BUHW, then running BUHW-2 will cause problems. As will running an electrode gap plug. If Mr Mercury says use plug "xyz", then use plug "xyz". I really get cheesed off with 'armchair specialists' who think manufacturers wasted millions of dollars on researching the correct part for an engine. Yes, I'll admit that sometimes they get it wrong, but they usually issue a recall notice or service bulletin. Now, off the soap box. The gap on the BUHW is 0.060" and the gap on the BUHW-2 is 0.080". So, before anything else, get the right plugs in the engine!<br /><br />Chris.............<br /><br />LD. I did see that original post. Lucky you changed it, ah?

 

[kentfa]

Re: My spark plugs are wet

well, i need to check my manual again. those plugs were expensive, 12 us pr unit! I will not change them intil i tryed to clean the carbs. what is in the rebuild set, new gaskets?<br /><br />I tryed the Start-gas test and it did what it was suppose to do, slow down when i sprayed in the carb! No one ever tryed this? If the test is good, its a very easy way to check if the engine gets fuel.

 

[BillP]

Re: My spark plugs are wet

Originally posted by achris:<br /> OK. Let's get back to some of Bobbo's comments. The spark plugs you're talking about don't have a heat range. They are surface gap plugs. If the correct plugs are BUHW, then running BUHW-2 will cause problems. As will running an electrode gap plug. If Mr Mercury says use plug "xyz", then use plug "xyz". I really get cheesed off with 'armchair specialists' who think manufacturers wasted millions of dollars on researching the correct part for an engine. Yes, I'll admit that sometimes they get it wrong, but they usually issue a recall notice or service bulletin. Now, off the soap box. The gap on the BUHW is 0.060" and the gap on the BUHW-2 is 0.080". So, before anything else, get the right plugs in the engine!<br /><br />Chris.............<br /><br />LD. I did see that original post. Lucky you changed it, ah?

Bobbo,<br />Running the wrong plugs can make a BIG difference in performance.<br /><br />acris,<br />Why don't these suface gap plugs have heat ranges? If you can believe what the mfgs say, heat control isn't exclusive to electrode length. What is the difference between the BUHW & BUHW2?<br /><br />I agree with you on trying to outsmart the engine mfgs...only in an "armchair specialists" dream does it happen.

 

[achris]

Re: My spark plugs are wet

Don't know why they don't have a heat range. It's what I have been told on serveral of the training courses I've been on. The difference between BUHW and BUHW2 is the distance from the centre electrode to the inside edge of the outer body of the plug. BUHW is 0.060" and BUHW-2 is 0.080"<br /><br />Chris...........

 

[UNCC Grad]

Re: My spark plugs are wet

Bobbo, I just got a call from my brother who ran the boat today after spraying th carb with Sea Foam and no change in operation. Have you made any progress with yours? <br /><br />I keep hearing it is the powerpack, but I'm not sure that it is. If it is the fuel pump diaphram, would it still be getting good fuel to the carbs? Brother says the carbs are getting a good stream of fuel.

 

[kentfa]

Re: My spark plugs are wet

I have not gained any progres with the motor but i found a leak in my boat so the bottom of the boat is filled water under the floor. this will steal som topspead, but it woldn explayn the wet plug and the lack of power. i will take the boat out of the water next week, fix my leak and go over the motor onshore. test the timing. <br />i tryed to screw out the screw for som igniting on babor side of the engine, connected some rope to it and tryend to pull the rope while wot, but it only ran porer. im trying everything now<br />...learning alot thow.<br /><br />have you tryed the start-gas theory? no one of the expert on this forum has commented on that. can enyone do that...please?<br /><br />What kind of spark plugs do you have?

 

[UNCC Grad]

Re: My spark plugs are wet

I just got off the phone with my brother who has it at the mechanic's as I type. The mechanic checked the electrical system and everything (stator, trigger, switchbox) was OK. He then pulled the foot to check the exhaust port and found that it was severly clogged with carbon deposits. Word has it the exhasut port is supposed to be 2" in diameter and mine was clogged to roughly 3/4" diameter.<br /><br />Bobbo, you might want to check this out in your diagnostic search. It makes sense that with a clogged exhaust it wouldn't well at all. I know from motorcycle and ATV experience that putting a more open aftermarket exhaust on a 2 stroke makes a huge power gain, more so that on a 4 stroke.

 

[mellowyellow]

Re: My spark plugs are wet

auto or manual oil mixing?

 

[kentfa]

Re: My spark plugs are wet

i dont understand what you mean by foot? is it the lower part of the engine or can it be done easyly? is it the exhaust pipe at the propell?<br /><br />It is automixing!

 

[UNCC Grad]

Re: My spark plugs are wet

Bobbo, the exhaust port I speak of is below the powerhead, but can be accessed if the lower unit is pulled. My mechanic took a long screwdriver and a hammer and chiseled out a bunch of carbon deposits. The motor feels like new now. I didn't have a GPS, but I'd say I was running about 30mph with myself(200#), my newphew(170#) and my lab(65#). As I stated earlier, I could barely get it to plane with just me on board before cleaning out this exhaust port.<br /><br />Some others that have more experience in this area may be able to chime in and tell you exactly how to access this exhaust port.

 

[Barnacle_Bill]

Re: My spark plugs are wet

Bobbo, did you say it cost you $12 each for plugs?<br />I did a quick check and BUHW plugs were $3.45 each and that's before my discount.<br /> http://rickracers.com/index.php?cPath=589&osCsid=bcc0f25c966704e6a9d3301f7c828978