cleaning carbs project-need consulting

[sameh]

o.k. got this outboard mariner 75 hp 2 cycles year 1993 3 cylinders.
outboard been sitting for a few months before i got it.
engine hardly starts, the starter works and sometimes the engine runs after many starter trials.
spark plugs replaced.
after examining the gas tank seen many fealth-not surprised it is not running properly. gas tank cleaned.

next step, cleaning carbs. took out the carbs (3 carbs-first time i do that and very happy about it) saw on the lowest carb dirt and black stuff (not seen much in the picture). I conclude it definitely needs a cleaning. it would be sent to a professional to deassemble them and clean them.

afew questions:

1-your opinion regarding carb condition.
2-do i need to clean also the pipes connected to the upper carb (one coming from gas filter and other goes to some unit i still don't know).
3-how can i clean the pipes?
4-is it common to have lowest carb with more problems than the upper carbs?

5- cascades on carbs are not complete one unit but torn to half. i won't find here new cascades. how important to have un-torn cascades for that and is there other options or modifications so cards would function correctly? i dont have enpugh knowledge about cascades and their role...


6-engine before getting carbs out was leaking gas, mainly when it is not fully down (prepindicular to ground) but when trim is pushing it upward). any clue about reason? i didnot notice where it comes from.

7-any other help and suggestion for other things i should do would be welcomed.

sorry for the not perfect english...

sameh

 

[ENSIGN]

Re: cleaning carbs project-need consulting

It's common to have more gunk in the bottom carb.I would strongly recommend REPLACING all the fuel lines,primer bulb and filter as all the debris cannot be cleaned out.Make sure the tank is CLEAN.If there's any doubt about the gas through it away.The part that the fuel filter is connected to is the fuel pump.(which may also need a rebuild)Good Luck,Ted

 

[Texasmark]

Re: cleaning carbs project-need consulting

After cleaning the carbs, either by immersion in something like Berryman't Chem Tool, or using their aerosol, instructions on the can, ensure that you give it a good blowing out with compressed air of 80-100# more or less.

Reason I mention the blowout, is that you should do that anyway but on my similar engine, even though the lower carb bowl looked clean, when I put the air hose to it blowing air in the reverse direction to fuel flow through the high speed jet located in the bottom, a plug of what looked like pieces of hose blew out the inlet side of the HS jet and just happened to be the "smoking gun" as to why I was having problems.

I sincerely suggest you get a manual to get the carb/timing setup correct as it is very important with these engines. Also idle speed adjustment changes timing, not carb jet tweaks like used to be the case. You can get a SELOC manual on this site and either buy the manual or buy a subscription to online use for a given period and just down load what pages you need.

HTH,
Mark

 

[quicktach]

Re: cleaning carbs project-need consulting

Get a service manual and study/follow it. Don't clean but replace fuel lines. Fuel filter must be cleaned. Carbs will need to be set up to spec in manual and float levels must be checked and set. Carb rebuild kits are an excellent idea. Needles and seats may need replacing.
Linkage will all have to be adjusted when carbs put back on engine.