Can you outguess my mechanic

[kirmy22]

Need help fellas my mech is killing me. I have a 1983 mercury blackmax 150, took it to the mech to get the carbs rebuilt almost 300 dollars, put it in the water the results were the same idles fine give it throttle it bogs down, called the mech he said bring it back. I took it back 200 miles round trip. He rechecked spark all elec. were good so he decided I was over proped had a 23 pitch stainless, went and got a 19 pitch alum. Put it on went to the lake same thing give it throttle and it would bog, kept messing with the throttle and trim it finnally took off and ran great, killed it fished awile started it and the same thing all it would do is bog and I could smell gas really strong, came home pulled the high speed jets and a couple of them hadnt been touched even though I paid him for carb work. I called him and told him I thought it was the carbs, he said no it was the stator he would guarentee that was the problem, ha said bring it back to him and he would fix it for 130 plus the stator. I ordered a stator here from iboats put it on went to the lake, guess what same thing bogged down. Kept messing with the throttle and it would finnally take off and run great untill you slow down then it idled really bad and would die, and it smells like its flooding really strong gas smell. All the electronics are new good compression, please help, should I REDO THE CARBS MYSELF AND JUST GIVE HIM THE MONEY FOR NOTHING. Im about ready to pull the plug and let it sink. any help would be great, thanks

 

[Maxz695]

Re: Can you outguess my mechanic

rebuild the carb yourself and fuel pump if that hasn,t been done yet. The seat is not sealing and your flooding out the engine

 

[85 BOMBER]

Re: Can you outguess my mechanic

Does it start up easily after you've had it shut off for a bit?

 

[kirmy22]

Re: Can you outguess my mechanic

Yes it starts right up no problem, even if it dies it starts right back, but if you give it any throttle it runs like crap

 

[cr2k]

Re: Can you outguess my mechanic

When was your last real tune up? Has it been synced and linked lately? I am guessing it would be very easy to outguess that whom you are calling a mechanic.

Us real marine service techs dream of customers like you. Stator? Really? Diagnosed over the phone? Last time I diagnosed a stator it took almost an hour, special tools and a factory service manual.

 

[Marine Mechanic]

Re: Can you outguess my mechanic

I agree with rebuilding the carbs

 

[aussieflash]

Re: Can you outguess my mechanic

Check everything from fuel tank up,including intake,filters,hoses,pumps,fittings.It does sound like stuck float in carbs or worn needle n seat.Check your gaskets in carbs.If they are worn you should get your money back.

 

[Sixmark]

Re: Can you outguess my mechanic

The title of this post was very fitting because all the "mechanic" was doing was guessing, and for all of his guesswork did nothing to help. I would be returning to get some money back from that loon.

 

[j_martin]

Re: Can you outguess my mechanic

I bought a doggy XR4, and after I fixed the original dirty fuel tank and fuel system problem and the dozen or so misadjustments and wrong parst the "certified" mechanic guesser put into it, it runs like a scalded dog.

A little patience, a factory manual, and systematic diagnostics starting right at the beginning should either tell you quickly you're beating a dead horse, or get you on top of the water where you belong.

Like aussie says, if the "mechanic" "overhauled" the carbs and put used gaskets back in, you would have this set of symptoms. Assuming we're talking a V6 with WH carbs on it, that little gasket in the middle of the bowl is critical, and will almost always leak if reused.

If it were mine, I'd start with a compression check. Come back here with the info and hat in hand for the next step.

BTW, this board if full of guessers. Consider the source of any advice.

hope it helps
John

 

[kirmy22]

Re: Can you outguess my mechanic

Thanks for the responce so far, the serial no. is 6424308 it has the double carbs. And yes he used the old gaskets, he said he repaced two gasket and two needle and seats. One of the high speed jet screws has been epoxied on the outside so he said he didnt pull any of them because he didnt want to mess with them , and I pulled a couple of the bottom ones and they were green with some kind of flaky slime. And I did a compresion check I got 120 on all, he did one said he got 130 on all but one and it was 125. He has already cost me 250 carb job, 150 new prop and 200 new stator and Im still right where I started. Its so confusing because it runs so bad, but if you keep messing with the throttle you can feel it when its going to go its kinda like the power band on the old two stroke motor cycles when it kicks in it runs crazy good. And by the way all the little gasket/washers on the high speed jet screws are all to pieces thats how I knew he didnt do what he was suppose to. And I have a seloc manuel , is this no good. AGAIN iM VERY THANKFULL FOR ALL THE KNOWLIDGE IN THIS FORUM.

 

[carholme]

Re: Can you outguess my mechanic

22;

That s/n comes up as a model:

1150623 MERCURY 1983 150

Parts listing:

http://www.crowleymarine.com/mercury-outboard/575.cfm

Service Manual P/N: 90-976583

Gerry

 

[j_martin]

Re: Can you outguess my mechanic

Thanks for the responce so far, the serial no. is 6424308 it has the double carbs. And yes he used the old gaskets, he said he repaced two gasket and two needle and seats. One of the high speed jet screws has been epoxied on the outside so he said he didnt pull any of them because he didnt want to mess with them , and I pulled a couple of the bottom ones and they were green with some kind of flaky slime. And I did a compresion check I got 120 on all, he did one said he got 130 on all but one and it was 125. He has already cost me 250 carb job, 150 new prop and 200 new stator and Im still right where I started. Its so confusing because it runs so bad, but if you keep messing with the throttle you can feel it when its going to go its kinda like the power band on the old two stroke motor cycles when it kicks in it runs crazy good. And by the way all the little gasket/washers on the high speed jet screws are all to pieces thats how I knew he didnt do what he was suppose to. And I have a seloc manuel , is this no good. AGAIN iM VERY THANKFULL FOR ALL THE KNOWLIDGE IN THIS FORUM.

That's not service unless you're talking about definition # 10.

If you try to run that engine like that, you'll eventually burn down the powerhead. Don't do it. Fix it right.

Pull down the carbs. If a casting is broken, go get a set of usable carbs on eBay. All the WH's bolt interchange. Any set off a 150 or even a 135 should do. I suspect the ones that are on the engine are so messed up they aren't worth rebuilding. They probably also have the foam floats in them, which are junk and usually act just like you're describing.

I wouldn't go back to that butcher, er "mechanic" unless it is to render service, definition #9. In that note, I'd take detailed closeup photographs of all you find when you tear down the carbs for inspection. Go for the original charge, and your expenses for a couple of trips. Not only did he not fix the obvious problem, he probably made it worse by not using inexpensive required new parts.

Carb gasket kits are about 5 bucks apiece. It takes about 2 hours to go through 3 of them completely if you know what you're doing. Maybe 4 the first time. for $250 you would expect all new gaskets, and complete disassembly, cleaning, and assembly, and adjustment (float height is the only one). Maybe extra for needles and such if needed.

hope it helps
John

 

[bullet 101]

Re: Can you outguess my mechanic

BTW, this board if full of guessers. Consider the source of any advice.

hope it helps
John[/QUOTE]



Amen to that.

 

[sschefer]

Re: Can you outguess my mechanic

I can't out guess you mechanic.. No respectable mechanic would.

There's a dozen or more things that can be leading to your problem. If I were to tell you to rebuild the carbs I'd be stupid. There's a systematic method to getting to the carbs as the cause.

Many times you'll find the real problem along the way. This is one of those problems that attempting to diagnose with a positive answer without the motor in my tank is not a path I want to lead you down.

I will lead you down the correct path though. Either take it to a certified merc mechanic that knows the older motors or get yourself the Merc Shop Manual for the motor and start learning.

I don't mean to disrespect the folks that are trying to help you on iBoats, I'm sure everyone has nothing but the best intentions but you are ultimately the one that's spending the time and money. I made my fair share of really dumb recommendations here and made my fair share of mistakes building motors.

You are on the right path in asking if you're mechanic is guessing.. The simple answer is Yes.

 

[Maxz695]

Re: Can you outguess my mechanic

Well seeing we are ALL guessing and the machanic is guessing. I Guess spending hundereds of dollars on a so called MACANIC was the right thing to do? If you guys spent more time adding info rather than trying to critsize on something you cannot even pinpoint yourself then maybe he would have done like I said and fixed it himself, but seeing everyone wants to proclaim themselves right and I don,t see it, then whatever. All your doing is confusing a simple issue of a fuel issue with a bunch of babaling garble. The forum is for suggested information on probable causes of problems that may or may not help the poster. If you have information to add or other information you feel the poster needs then post it. It is up to the poster to take what he needs and leave the rest. Not up to recipricated posters to critsize. This is not conducive to this forum. With that said Have a great day

 

[kirmy22]

Re: Can you outguess my mechanic



Could this be my problem, only one vent jet in top and bottom carbs middle one has both, that would explain why it idles good and runs wide open good but floods in mid range, according to manuel those being open with no jet would make it run really rich in mid range

 

[Maxz695]

Re: Can you outguess my mechanic

Apearently so. He musta been on Crack or had one to many when he rebuilt those. Wonder what eles he forgot. It,s a good thing you took them off . I would never bring your stuff to this guy again

 

[kirmy22]

Re: Can you outguess my mechanic

Never mind those two arent suppose to have jets, thought that was the problem for a second

 

[Sixmark]

Re: Can you outguess my mechanic

Apearently so. He musta been on Crack or had one to many when he rebuilt those. Wonder what eles he forgot. It,s a good thing you took them off . I would never bring your stuff to this guy again

Pot .....meet Kettle. Just two posts prior you were complaing that everyone else was doing exactly what you are doing now.

 

[Maxz695]

Re: Can you outguess my mechanic

pump up the carb bowls and see if you are getting leaks or masive flows into the carbs. PS I,m not bashing or critisizing anyone on this site bro