what is this

[fisherman81654]

This is off my 1985 mariner 175 hp.
I tore it down to this because number one cylinder was not getting fuel.
The rest of the cylinders get fuel.I have rebuilt the fuel pump,the primer bulb pumps up and stays hard.
Vents are open,rebuilt carbs and still no fuel to number one cylinder.

I thought I may have a reed problem,but to me they look fine.
The only thing I notice is the black reducer in the block that supplys fuel to cylinder 1 and 2.
The other two ports,not shown in the pic,supply fuel to the other 4 cylinders.Those 2 ports do not have a bushing in them,(maybe they also are suppose to have a bushing ,I dont know)so I would think that the bushing at the top shown in the pic,is restricting the fuel flow,I run a small wire in the hole ,it is open.

Compression on all cylinders is 120 psi.

Any help MUCH appericated.

 

[jimmbo]

Re: what is this

Those look like part of the oil recirculation system. You could try looking at a part book, it might say how many are needed

 

[j_martin]

Re: what is this

I don't think that's your problem. I believe that galley and ports are just vacuum ballancing between the carbs, of little or no consequence in your case.

You have a plugged needle valve, or a bad gasket, or something like that with the carb for that cylinder.

hope it helps
John

 

[Sprky]

Re: what is this

How have you verified the fuel issue?

 

[fisherman81654]

Re: what is this

J_Martin
I tore this motor down a couple years ago, because I thought I blew a cylinder.
I could not find any problems,(should have done a compression check first,my stupid mistake.
Compression is fine now on all six cylinders.

Getting back to when I tore the engine down a couple years ago,Had a tech to tell me to be sure and put those tiny inserts,I forget excatly what he said they did,seems like it was something to do with the idle of the engine ,I am thinking it was all three incerts,not sure.I tried to call the tech today ,he is no longer working there.I went to a big marinia today described my problem about the incerts to him ,he was not sure about them either although ater about fifteen minutes,he found the part number and said the motor takes two and was not sure were the two go.

I am just not sure now as to even put them in and take the one thats in there out???

I also rebult the carbs again tonight and really took a good look at the top carb,I am sure they are not a problem.

Yes Sprky,I am sure that number one cylinder is not getting fuel.
I ran the boat on the lake wide open ,turned off the key ,run to back of boat,dealt with wave,ha,took covers off took out all plugs,starting with number one cylinder ,it was dry the one at the top across from it was a little wet and the rest were very wet.

Today I also replaced all the six gaskets on the reeds,when I tore it down a couble years ago,one of the reed gaskets I tore a little so who knows?

Tomorrow ,it goes back together and (I think I think) I am going to take out the top restricter.

Jimmbo
I looked online to try to find a diagram that shows that incert,could not find it.
Nothing in my rebuild manual about it either.

 

[Faztbullet]

Re: what is this

It is a bleed restricter part # 66517 and do not remove it !!!! It has nothing to do with fuel supply to any one cylinder ,its part of the recirculation system.

 

[j_martin]

Re: what is this

There's quite a bit of stress on the reed block gaskets, and if one fails, it'll totally wipe out idle. No way would I use used ones, much less a damaged one.

The sides of the gaskets are quite thin and held in place only by clamping pressure.

On carb "rebuilding". Once my father in law had a car with an obvious carb problem. Stalled frequently, and ran good most of the time. He pulled into my yard with it misbehaving, and I quickly found a fuel problem and verified fuel pressure, so I told him it needed a carb kit. He said it was just overhauled in the last 2 weeks.

When I was tearing it down, I started to pull the main jets and he told me that didn't need to be done. He just watched a dealership tech do the job, and he didn't pull those parts out.

Under one of the main jets was a nice big fat curl of brass turning that had been there since the factory. It acted as a random action shut off valve.

just sayin'................

 

[j_martin]

Re: what is this

Hey Fazt,

What's the symptoms if the piston is wrong, ie wrong side or upside down?

 

[Faztbullet]

Re: what is this

Low power ,it will have compression but porting on piston is not timed to cylinder. I will tell on myself as I built a deuce once and turned one over. Ran good,decent hole shot, low rpm's you could just tell something wasnt quite right....

 

[Sprky]

Re: what is this

The recirc system is not your problem. If you have compression and spark and have done your job with the carbs, then it should run. Either you haven't done your job with the carbs or it is not fuel related. The simplest way to identify fuel, electrical or other is to run the motor on the ramp under a light load.(2500 rpm) and hit the offending cylinder with a shot of carb cleaner. If it picks up then you know for sure it is fuel related. It it does not then it could be spark, imploded reed cage gasket, or broken reed. You have determined that the reeds are in tact... One down. Look at the reed cage gasket. If you find that is ok then reassemble and go to the ramp and verify it is fuel. Once verified there is only one thing left. The carb.... look behind the seats for trash, make sure the seats are tight. Make sure main is clear and is the proper size. If a piston is in upside down the motor will have a loud tick. (got that T-shirt)

 

[fisherman81654]

Re: what is this

You are right Faztbullet! I found out that my motor takes two restricors,I JUST DO NOT KNOW where they go:facepalm: I have looked and looked and called marinias boat techs and no one seems to know,:facepalm:,I hope someone here does.1985 mariner 175 hp A137316

 

[Sprky]

Re: what is this

You are fooling with the portion of the bleed system that feeds the main bearings. You are getting ready to make a mess.

 

[fisherman81654]

Re: what is this

Thats why I am asking?

 

[Sprky]

Re: what is this

Like has been said before by several, this is not your issue.

 

[fisherman81654]

Re: what is this

I understand,but it is an issue with the idle of the motor.I bought an idle stablizer to put on it awhile back and I do not want to put that back on.I heard if they go bad they can blow an engine. I know the bleed issue is the problem of my boat not wanting to idle properly,thats whyI want to install the bleed restrictors in the right holes,just dont know WHICHtwo holes to put them in.

 

[Faztbullet]

Re: what is this

Your engine only uses 1 restricter and it is already in place from the picture you posted earlier. This does not feed the center mains on a vertical reed reed engine as they are fed by a hole in bottom of port from #1 & 3 cylindersr...

 

[fisherman81654]

Re: what is this

Ok Faszbullet.I guess I will put it back together.
I just don't understand why the specs call for two restrictors.

 

[Sprky]

Re: what is this

This does not feed the center mains on a vertical reed reed engine

Correct, it is how the lower feeds the upper and excess lube is pulled of the center mains.

Are we here to one-up each other or help this guy out.

 

[fisherman81654]

Re: what is this

Ok ...I took the good advice here I recieved and glad I did.
I called the marinia back one more time ,got a parts guy on the phone and he confirmed after awhile what you guys were saying.He said the specs call for one restrictor.

I reassembled everying except for the hose that goes to number three cylinder,I can not find a port there,took the powerpack bracket loose where I could see,nothing! I have an old service book that has( a ) diagram of how to hook up the bleed hoses,not sure whats going on here,that motor not haveing a place on numer 3 cylinder to hook a bleed hose? I had marked all the hoses before I took it apart except one,I think it was hooked up to the carb cover(air box) at the bottom,but according to the diagram it should go to number three cylinder.

I did a search on here and saw where another person had the same problem,(not having a bleed port on number 3 cylinder).
he was told more less ,don't worry about.I kind of understand that but should the bleed hose be pluged off?,or left hanging loose?Like I said earlier ,I think it was hooked to the air box?

Thank you !