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135hp Bleeder Lines

S

saw

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"Hi, I still working on my 198

"Hi, I still working on my 1986 135hp mecury. I was able to take the boat out again to see if the hose at the bottom of the crankcase being off was the idle problem but it wasn't . I got alittle more faith in the motor though when we tried it this time . This is just the second trip overboard. The outboard runs forever in any throddle postion but the creepy crawl idle then she seems to lean out sneeze and cut off. every time it cuts off it starts up quick. I'm pull'n the carbs off today I might even just pull the top carb cause that's where the problem is, the top 2 cylinders. Engine don't run on the top 2 cylinders when idling . I pulled the spark plug wires off at a idle and with both wires off you can't even tell that the wires are off. But the second you crack the throdle with the wires on you can tell she picks up but cylinders right away. So it's just at a idle the engine won't hit these 2 cylinders. The engine has good power and compression on these cylinders 115-125 psi. The oil injection system has been pulled off. Bandit told me to check the carbs and to make sure the "Bleeder" lines are in place. Sooooooo to be honest I don't know where the bleeder lines go and excactly were they are. Are they at the back of the engine on each cylinder ? Small rubber lines that come off the cylinders and some look like they go to the carbs and some look like they may go to a switch. But the thing that conserns me is that the top carb has a small tee fitting on the top of it and someone has just hooked this fitting in a loop. Hose comes out one side of the fitting and connects to the other side of the fitting, is this right or not because this is the carb that i have the 2 dead cylinders on at a idle. Thanks for your time and help
Scotty"
 
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The hoses are wrong. I do not have to book in front of me. I will look it up tomorrow. That tee is not right. The switch you are talking about is probably the primer. That has a line on the botton of the top carb and a line going into those tee's. There is a specfic order that those lines go in. They criss-cross around the block.

It is hard to have two dead cylindes at idle unless the draw tubes in the carb are blocked. The top of the carb has a clean-out plate The small bress tubes inside the bigger ones is where the gas gets pulled up to the top idle feed holes."
 
"Thanks Bandit. I think I foun

"Thanks Bandit. I think I found the switch in the book, it's called a enrichener value and the hose layout of the hoses for that is there too, but I can't find what or where those little rubber lines go and what they do that come out the sides of the cylinders toward the back of the engine and come foward toward the carbs. I wander if the top carb has been replaced and that's why it has a tee looped together on the top or that tee does have a home it is suppose to plug into? Thanks
Scotty"
 
Those tee's go to the enri

Those tee's go to the enrichener valve. The middle carb has a tee/elbow as well right? IIRC the top and middle carb are connected by those tees and then to the enrichener valve.

The lines coming out of the cylinders on the sides are the fuel recirc (bleeder) hoses. Most of those go across the block to another cylinder on the other side. Some go to the intake (reed block).

You really need the Factoy Service Manual From Merc To figure this out. The brass jets in the carbs are all different sizes. Those go to a specfic cylinder. Don't mix up the parts. All the carbs should have the same WM #. cast on top plus a dash 1 2 3 is the order they go on the motor.
 
"Or, it was the middle and bot

"Or, it was the middle and bottom carb. On the right side of the carbs were the linkage is there is a hose going from one tee in the middle to another elbow at the bottom. The middle tee went to the bottom port of the enrichner out the other side if it. The top enrichner port went to a drain fitting on the top carb fuel bowl at the bottom of it."
 
"I have the type that is on th

"I have the type that is on the right side standing behind the outboard. 2 hoses come off the pump, 1 line goes to the top carb, bottom of the bowl there is a small 90 degree fitting that the hose hooks to. The other hose goes to one side of a tee on the top of #2 carb. and the other side of this tee goes to carb #3 top of carb 90 degree fitting. So I guess nothing from the enrichener pump goes to the top of the top carb but I do have a tee fitting on the top of the top carb that is blocked off with a looped hose. Now as far as the bleeder hoses go I may need a map and a compass to gat me through them. I can't find anything in the manual to go by to check these hoses. That looks like a hair puller. Did i under stand you right that the carbs have different size high and low speed jets for each set of carbs ? If anyone can find a digram of these bleeder lines please let me know. I have a manual but can't find anything . Does any thing suppose to go to the top tee fitting on the top carb or has this carb been replaced somewhere down the road and that's why it's capped or looped together?????????? Thanks for your time and help
Scotty"
 
"The valve hoses seem to be ok

"The valve hoses seem to be ok.
You have the factory manual from Merc? The top carb I don't remember having a tee. The carb that is on top now might have been a middle or bottom unit off of another engine. The WH #'s stamped on the flange will tell you that. It will go WH## -1 -2 -3.

If I had the serial #, I can find out what # carbs belong there. "
 
Thanks so much for all you tim

Thanks so much for all you time and help Bandit. The serial# is A980113...... the # that is on the flange part of the carb that bolts to the intake and starts with the letters WH is WH-12-2 that # is on one side of the tee and then there is another # on the other side of the tee and that is 1382-6425 it also has MERCARB stamped straight across from these #'s where the back of the air box would bolt on. If the jetting is different in each carb and this maybe a #2 carb in a #1 spot could this be my trouble ? and if these bleeder lines aren't plugged in where they should be could that be a problem ? Thanks
Scotty
 
WH-12-2 on the top carb? Shoul

WH-12-2 on the top carb? Should be 12-1. Middle carb is 12-2 bottom is 12-3. So you do have a middle carb in the wrong place. Or someone mixed them up somehow. But that is very hard to mess up. I will run that serial # tommrow or the next day. That is the problem. Hold off on those bleeder lines for now till you get the right carb in the right place. Because that tee fitting was never there on the original #1 carb. All the brass jets are different in each carb. An '86 engine would have vertical reeds that may make a difference as well. I have another 135 in my yard I can look at. Also an '86 I believe.
 
"Wow! That's pretty diffre

"Wow! That's pretty diffrent . I've worked on the water for 23 years crabbing and the last 7 years as a John deere AG Tech, this is the first time I've ever heard of a animal like this before but this is the first Mercury I've ever owned too. I'll have to look at the other 2 carbs to see what #'s they have on them. How's that work as far as the different carbs go...All the low speed jets different sizes and the high speed the same? Does the low speed top carbs start out small jets and get bigger on the low side as they go down 1-2-3 ????????????? on the top carb I did look at the high speed jets in the bowl and they said 050...... Thanks"
 
"The high speed jets will be d

"The high speed jets will be different on every cylinder on most engines. Some has to do with those bleeder hoses re-routing puddled gas to another cylinder. The factory tuned the engine on a cylinder by cylinder basis. I am not an engineeer, but i think this helps eliminate any "hot holes" that some engine's where known for. Exhaust tuning has some to do as as well.

There is a chart in the manual that tells you where those go. "
 
I think I understand ... extra

I think I understand ... extra fuel helps cool things down..... a lean hole is a hot hole....some cylinders may draw alittle more fuel than they need and the tuning part is the routing the fuel to more lean holes by the bleeder lines ?????????? anyway....Thank You
 
"Hey Bandit, it's looking

"Hey Bandit, it's looking more and more like a mismatched like you said. It's hard to see the #'s on the other 2 carbs because they are still on the powerhead but I was able to make out on #2 carb wh-2-35 and on the # 3 carb I was able to make out wh-3-35 On both 2 and 3 carbs the #'s were not on the flange part of the carb it's on the front part of the top of the carbs close to the air box side and the #'s are alittle different than the carb that was on the top. The positon # is after the wh and then a whatever # where on the top carb that I took off it had the wh then 12 then postin #. So I guess I need to make this carb a # 1 positon carb by re- jetting???????? or maybe try to buy what belongs on there ....... Know where I could get something like that??????? That's wild how the carbs are set in a 1-2-3 positon and each are alittle different. That's what you call getting down to it! But the more I work on this Merc the more I'm starting to like it. I took the top carb off and cleaned it and look for some type of blockage but the carb was clean as a pin but I liked how it's built. simple and not many parts! I didn't really find a blockage anywhere so maybe we are on to something with this mismatched carb. Thanks for your time and help
Scotty"
 
O.k. If there was no blockage

O.k. If there was no blockage than I am not sure that you can rejet an incorrect carb only because of the idle progerssion holes may be positioned differantly amongst other things.
Two choices of carb sets that were used here:
First one:
Wh-35-1-.050" main;.060" idle;.094" vent
WH-35-2-.050" main;.060" idle;.094" vent
WH-35-3-.050" main;.060" idle;.094" vent
(.044" idle was used on some models on the #1)
OR:
WH-38-1-.052" main;.046" idle;.096" vent
WH-38-2-.052" main;.046" idle;.096" vent
Wh-38-3-.052" main;.046" idle;.096" vent
(.044" idle was used on some models on the #1)
So they are all the same on your engine.
P.S.
Don't bogger up those plastic floats. You can't buy that anymore. (Obsolete)
 
"O.K. this means I do have a o

"O.K. this means I do have a odd carb on the top cylinder (#1) because the top carb #'s were.....
(#1) wh-12-2 (#2) wh-35-2A (#3)wh-35-3A So with no blockage found in the carb and having this odd carb could be my idle problem?????? So
What do you suggest,... try to find a carb that matches #2 and #3 ?.... Got any ideal where I might have a chance finding one ? Thanks Bandit
Scotty"
 
"Oh, I know it is the problem.

"Oh, I know it is the problem. If you can find the right one in a marine junk-yard all the better, if not you can try to rejet what you have I just don't know how well that is going to work. You may be stuck on this for a while.

Well, I hope all that helped. I'll be here..."
 
Thanks for all your time and h

Thanks for all your time and help Bandit!!!! I'm going to try to find the right carb but I think trying to find a 1986 Mercury 135hp carb for the top cylinder with the #'s wh-35-1 is going to be funner than watching 2 Buzzard's mate! But at least I have a place to start now because with good compression and good spark with no water on a good spark plug she's suppose to hit that cylinder at a idle. I guess the first place I'll start to look for a carb is back track and try to contact the people I bought the boat from to see if they chunked it or kept it. Thanks again
Scotty
 
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