Carb advice

H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Ok I've about got my motor perfect. Now the only thing left is the carb has a dead spot. 1985 evinrude 60 hp. Carbs are clean.ive ran wire threw all the jets and blowed them out.many times.if I give it gas slow it kills out unless I hit the choke.if I give it gas fast it runs fine I just back off a little when I do that. It has no adjustments on the carb.only thing I have seen is the choke has a red knob on it that turns.would turning it make it right? This is the newest motor I have owned.im more of a fan of the older motors cause you can adjust about everything and does not have a computer. The butterfly's are closed at idle. It's like the low speed jets are not getting enough fuel.it does not run rich.clean plugs every time I run it. It don't even blue smoke much.im mixing 50:1.
 
R

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,459
Re: Carb advice

That primer injector ( choke ) is an electric valve.-------It opens when you push in the key in while cranking.---It injects fuel for quick starting and it is a very good set up.------The red lever is for manual operation of the valve should you have a dead battery.
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

racerone said:
That primer injector ( choke ) is an electric valve.-------It opens when you push in the key in while cranking.---It injects fuel for quick starting and it is a very good set up.------The red lever is for manual operation of the valve should you have a dead battery.
Click to expand...

But if it's Manuel what would the the battery have to do with it?
 
D

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: Carb advice

If you have a dead battery and you have to pull start with a rope, you will need to rotate the red lever 180 degrees from the automatic position to manually choke the engine. When you get the engine started, then you have to rotate the red lever to the automatic position to keep the engine from flooding out.
When you cleaned the carbs, did you remove the core plug on top of the carbs and make sure the tiny passages inside are clean?
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

Daviet said:
If you have a dead battery and you have to pull start with a rope, you will need to rotate the red lever 180 degrees from the automatic position to manually choke the engine. When you get the engine started, then you have to rotate the red lever to the automatic position to keep the engine from flooding out.
When you cleaned the carbs, did you remove the core plug on top of the carbs and make sure the tiny passages inside are clean?
Click to expand...

I did not do that I did not want to brake it but I did blow air threw the jests where that plug is.it has 2 small holes and both have a steady stream of air going threw them.to be honest I've been threw this carb maybe 20 times and I'm convened its clean.
 
jimmbo

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
13,652
Re: Carb advice

Floats are set correctly? Both carbs are synced together, and synced to spark advance?
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

jimmbo said:
Floats are set correctly? Both carbs are synced together, and synced to spark advance?
Click to expand...


Both floats sit level that's the only way I know to tell.both are synced to gather and spark advanced idk the arrow is pointing at the center of the wheel. I'm sure it's the low speed jet or jets. It runs perfect after you bump the choke on plane.
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

That will be the next thing I do.ive restored the whole boat and motor.a rigger owned it.
 
E

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: Carb advice

Some of the running issues could be related to the relationship between the ignition spark advance and the simultaneous opening of the carb butterflys. This relationship is called the sync and link. If it's off-it could cause a bog situation. It is not complicated, but difficult to explain in a brief paragraph. Look for this detailed procedure in a copy of the original factory service manual.
 
bonz_d

bonz_d

Vice Admiral
Joined
Apr 22, 2008
Messages
5,276
Re: Carb advice

ebay, used. have bought many that way and all have been complete and clean.
 
bonz_d

bonz_d

Vice Admiral
Joined
Apr 22, 2008
Messages
5,276
Re: Carb advice

I posted this to someone else a while ago but is still relavent.

I had an 18hp Evinrude that had a carb problem. I too thought it was clean. No to little improvement. I ended up cleaning that same carb 3 different times before it would actually idle the way it was supposed to. Each time I thought it was clean.

Also on engines running multiple carbs. If just one is running lean it can and has caused damage to that one cylinder.

I have read and talked to many owners of 2 and 3 cylinder OMC engines using VRO that had blown up on them and then they blamed the VRO pump, only to later discover that there was only 1 cylinder that was damaged. More likely to be a faulty carb than a faulty VRO pump.
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

bonz_d said:
I posted this to someone else a while ago but is still relavent.

I had an 18hp Evinrude that had a carb problem. I too thought it was clean. No to little improvement. I ended up cleaning that same carb 3 different times before it would actually idle the way it was supposed to. Each time I thought it was clean.

Also on engines running multiple carbs. If just one is running lean it can and has caused damage to that one cylinder.

I have read and talked to many owners of 2 and 3 cylinder OMC engines using VRO that had blown up on them and then they blamed the VRO pump, only to later discover that there was only 1 cylinder that was damaged. More likely to be a faulty carb than a faulty VRO pump.
Click to expand...


I do know my vro pump was removed.im not sure what it did but have a idea.
 
bonz_d

bonz_d

Vice Admiral
Joined
Apr 22, 2008
Messages
5,276
Re: Carb advice

huntingtheworld said:
I do know my vro pump was removed.im not sure what it did but have a idea.
Click to expand...

The VRO pump mixes the fuel and oil, 2 seperate tanks.

Still in this case, no VRO, if there is one cylinder that is running lean because of a dirty carb you can still scorch a piston, cylinder.
 
H

huntingtheworld

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
254
Re: Carb advice

bonz_d said:
The VRO pump mixes the fuel and oil, 2 seperate tanks.

Still in this case, no VRO, if there is one cylinder that is running lean because of a dirty carb you can still scorch a piston, cylinder.
Click to expand...

That's what I figured.im 100% the carb is clean.im literally checked it 20 times.every passage.
 
You must log in or register to reply here.
Top