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Author Topic:   OMC 40

JohnAz posted 07-27-2002 06:33 PM ET (US)
On a 92 40 evinrude just above the throttle linkage, on the sarboard side of the engine, there is a schrader valve, with a red lever, and an electrical box{selinoid i think}does any one know what this is for?????
Clark Roberts posted 07-27-2002 06:40 PM ET (US)
John, this valve, I believe, is for injection of anti-carbon treatment (OMC packages it in a pressure can with valve attachment... follow instructions on can). As to the red lever, it must be turned to proper position for the treatment and also is used in conjunction with a manual primer for rope start... not 100% sure of the above as have not had an OMC in many years... others will clarify no doubt... an instruction/operator's manual for your engine should describe completely! Happy OMC... Clark... Spruce Creek Navy
skookum point posted 07-28-2002 01:02 AM ET (US)
John, On my 1987 OMC 40 that red lever switches the choke from manual to remote. Maybe it has another purpose as well ?
Boston Marine posted 07-28-2002 01:56 AM ET (US)
To correct the incorrect answers above.
The little red lever,which rotates axially changes from auto prime to a manual shot of fuel in each carb in the event of prime solenoid failing. These engines do not utilize a choke per say as in a butterfly but they use a primer. Very small soft flexible tubing, One on each carb.
Tom W Clark posted 07-28-2002 11:40 PM ET (US)
JohnAz,
You’ve received three substantially correct answers to your question, the first two (from Clark and John respectively), offered in the spirit of helpfulness, and the last (from Greg) an arrogant reply which ironically is itself is not fully correct.
The lever is there you help you get the motor started if the primer cannot be used. Be throwing the lever approximately 180 degrees you can squeeze the primer bulb on the fuel hose and force raw fuel into the carburetor instead of relying on the primer to do this task.
This is most commonly done when rope starting the motor if you lose battery power. With no battery power or the chance to hold the ignition key depressed to activate the primer you need some other way to introduce gas into the throat of the carburetor to start a cold motor.
The usual procedure for emergency rope staring is to squeeze the fuel hose bulb until pressure is felt, throw the lever, squeeze two or three times to squirt fuel into the carburetor, return the valve to it’s original position and then pull the rope. Very effective. I never failed to get my own 1990 V6 Johnson 150 hp motor started this way with only a pull or two.
Additionally, a fitting is sometimes installed on the lever (it replaces the acorn nut which holds the lever) with a fitting which simplifies the introduction of fogging oil or “engine tuner” into the carburetor. I had my mechanic install one on my motor. It makes it easier and cleaner to squirt fluids into the motor without having to got through the air intake.
Greg,
“...rotates axially...”? That’s pretty much redundant. One has to wonder how one would rotate the lever other than axially.
Boston Marine posted 07-29-2002 01:33 AM ET (US)
OK already,Radially Then...
BTW-You dont read too well
manual shot of fuel in each carb in the event of prime solenoid failing
"Injecting Carbon Treatment"--Now I've Heard It All.
Clark Roberts posted 07-29-2002 07:37 AM ET (US)
Thanks, Tom, for a complete explanation of this OMC feature (should answer John's question!). As usual, your posts are very informative! Happy Whalin'...Clark... Spruce Creek Navy
JohnAz posted 07-29-2002 08:20 AM ET (US)
thanks all
skookum point posted 07-30-2002 12:35 PM ET (US)
AHA! I have been applying the fogging spray and tuner by a more primitive method. I hadn't noticed the valve before. Thanks Tom!
Bigshot posted 08-01-2002 02:42 PM ET (US)
Actually you are all right but Tom is also not 100% correct. Greg was more on the money. If you sqeeze the primer bulb it will ALWAYS fill the carb bowls with gas, no matter where the red thingy is pointed. If your primer solenoid is not working(it clicks) or you are manually starting the engine, rotating the red thingy 180 degrees shoots gas into each carb throat(more like into the reeds), not the bowls. You can have your bowls filled with ether but without a choke or primer to inject it into the intake, it will take a long time to get the gas out of the bowls. OMC's do not use a choke like Tom said this is more like an injection of gas. If you leave it on the engine will still run but not idle and smoke like a son of a. It is also used as described for other "maintenence"
skookum point posted 08-01-2002 03:01 PM ET (US)
So, is it the act of rotating the red lever that shoots gas into the intake or is it the squeezing of the bulb (with the lever in manual position)?
Bigshot posted 08-01-2002 04:31 PM ET (US)
Turning the lever. The ball you have to squeeze no matter what. Do not turn the lever unless you know something is wrong because you might forget to turn it back and be really "puzzled" when it won't run right.
DaveH posted 08-01-2002 04:53 PM ET (US)
Tom Clark:
I really didn't want to come off as a smarta$$ but you can have rotation that is not axial or concentric. There is eccentric rotation which includes parabolic, elliptical, hyperbolic and circular. I guess no matter how you write it, I still look like an a-hole. Blame my physics teachers.
Tom W Clark posted 08-01-2002 06:37 PM ET (US)
Nick,
You’ve got it backward. Turning the lever does not squirt gas into the carburetor. Turning the lever merely allows squeezing of the bulb to squirt gas into the carburetors. The lever is itself a valve and not a pump.
Regarding Greg, my point was that he was incorrect about Clark Roberts and skookum point being incorrect. Both Clark and John gave answers that were accurate thus Greg was incorrect when he said: "To correct the incorrect answers above." He wasn't correcting anything but merely elaborating on what had already been said. The technical answer he gave thereafter was substantially correct.
DaveH,
You're no smart ass, you are correct about how things in general can rotate. You’ll get no argument from me. But the rotation in question has to do with the little red lever found on the motor being discussed. I say again, how else does this lever rotate if not about it's axis? Or more to the point: What difference does it make. It has nothing to do with this discussion. The inclusion of the phrase "rotates axially" is pointless and stupid.
Bigshot posted 08-02-2002 11:19 AM ET (US)
We are all right. You use it to somehow choke the engine and winterize and decarbonize the engine. HOORAY!
ShrimpBurrito posted 03-13-2003 04:55 PM ET (US)
So where does the fuel go when you use the primer bulb when the red lever is in the "normal" position?
JBCornwell posted 03-13-2003 06:03 PM ET (US)
Doesn't anyone have and read the owners manual?
Red sky at night.. .
JB
ShrimpBurrito posted 03-13-2003 06:05 PM ET (US)
I don't have one......
WhalerGoFar posted 03-13-2003 06:47 PM ET (US)
I know what the little red "do-whitchy" does now.....but I would like someone who owns a manual to tell me the position of the "do-whichy" when in normal operating mode and which way to rotate it when it is needed to be put into action. Assuming pointing to the rear of the motor is "0" and stright up is "2" and pointing to the front of the motor is "3" please advise.
CMT
ducktwin posted 03-14-2003 07:58 PM ET (US)
"Normal" operating position is with the pointer on the valve pointed toward and parallel to the body of the solonoid.
Turning 180 degrees (pointer pointed away from solonoid yet still parallel) is the manual start position.
Bigshot posted 03-17-2003 10:05 AM ET (US)
It will click into a light detent when in the correct running position.

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Author	Topic: OMC 40
JohnAz	posted 07-27-2002 06:33 PM ET (US) On a 92 40 evinrude just above the throttle linkage, on the sarboard side of the engine, there is a schrader valve, with a red lever, and an electrical box{selinoid i think}does any one know what this is for?????
Clark Roberts	posted 07-27-2002 06:40 PM ET (US) John, this valve, I believe, is for injection of anti-carbon treatment (OMC packages it in a pressure can with valve attachment... follow instructions on can). As to the red lever, it must be turned to proper position for the treatment and also is used in conjunction with a manual primer for rope start... not 100% sure of the above as have not had an OMC in many years... others will clarify no doubt... an instruction/operator's manual for your engine should describe completely! Happy OMC... Clark... Spruce Creek Navy
skookum point	posted 07-28-2002 01:02 AM ET (US) John, On my 1987 OMC 40 that red lever switches the choke from manual to remote. Maybe it has another purpose as well ?
Boston Marine	posted 07-28-2002 01:56 AM ET (US) To correct the incorrect answers above. The little red lever,which rotates axially changes from auto prime to a manual shot of fuel in each carb in the event of prime solenoid failing. These engines do not utilize a choke per say as in a butterfly but they use a primer. Very small soft flexible tubing, One on each carb.
Tom W Clark	posted 07-28-2002 11:40 PM ET (US) JohnAz, You’ve received three substantially correct answers to your question, the first two (from Clark and John respectively), offered in the spirit of helpfulness, and the last (from Greg) an arrogant reply which ironically is itself is not fully correct. The lever is there you help you get the motor started if the primer cannot be used. Be throwing the lever approximately 180 degrees you can squeeze the primer bulb on the fuel hose and force raw fuel into the carburetor instead of relying on the primer to do this task. This is most commonly done when rope starting the motor if you lose battery power. With no battery power or the chance to hold the ignition key depressed to activate the primer you need some other way to introduce gas into the throat of the carburetor to start a cold motor. The usual procedure for emergency rope staring is to squeeze the fuel hose bulb until pressure is felt, throw the lever, squeeze two or three times to squirt fuel into the carburetor, return the valve to it’s original position and then pull the rope. Very effective. I never failed to get my own 1990 V6 Johnson 150 hp motor started this way with only a pull or two. Additionally, a fitting is sometimes installed on the lever (it replaces the acorn nut which holds the lever) with a fitting which simplifies the introduction of fogging oil or “engine tuner” into the carburetor. I had my mechanic install one on my motor. It makes it easier and cleaner to squirt fluids into the motor without having to got through the air intake. Greg, “...rotates axially...”? That’s pretty much redundant. One has to wonder how one would rotate the lever other than axially.
Boston Marine	posted 07-29-2002 01:33 AM ET (US) OK already,Radially Then... BTW-You dont read too well manual shot of fuel in each carb in the event of prime solenoid failing "Injecting Carbon Treatment"--Now I've Heard It All.
Clark Roberts	posted 07-29-2002 07:37 AM ET (US) Thanks, Tom, for a complete explanation of this OMC feature (should answer John's question!). As usual, your posts are very informative! Happy Whalin'...Clark... Spruce Creek Navy
JohnAz	posted 07-29-2002 08:20 AM ET (US) thanks all
skookum point	posted 07-30-2002 12:35 PM ET (US) AHA! I have been applying the fogging spray and tuner by a more primitive method. I hadn't noticed the valve before. Thanks Tom!
Bigshot	posted 08-01-2002 02:42 PM ET (US) Actually you are all right but Tom is also not 100% correct. Greg was more on the money. If you sqeeze the primer bulb it will ALWAYS fill the carb bowls with gas, no matter where the red thingy is pointed. If your primer solenoid is not working(it clicks) or you are manually starting the engine, rotating the red thingy 180 degrees shoots gas into each carb throat(more like into the reeds), not the bowls. You can have your bowls filled with ether but without a choke or primer to inject it into the intake, it will take a long time to get the gas out of the bowls. OMC's do not use a choke like Tom said this is more like an injection of gas. If you leave it on the engine will still run but not idle and smoke like a son of a. It is also used as described for other "maintenence"
skookum point	posted 08-01-2002 03:01 PM ET (US) So, is it the act of rotating the red lever that shoots gas into the intake or is it the squeezing of the bulb (with the lever in manual position)?
Bigshot	posted 08-01-2002 04:31 PM ET (US) Turning the lever. The ball you have to squeeze no matter what. Do not turn the lever unless you know something is wrong because you might forget to turn it back and be really "puzzled" when it won't run right.
DaveH	posted 08-01-2002 04:53 PM ET (US) Tom Clark: I really didn't want to come off as a smarta$$ but you can have rotation that is not axial or concentric. There is eccentric rotation which includes parabolic, elliptical, hyperbolic and circular. I guess no matter how you write it, I still look like an a-hole. Blame my physics teachers.
Tom W Clark	posted 08-01-2002 06:37 PM ET (US) Nick, You’ve got it backward. Turning the lever does not squirt gas into the carburetor. Turning the lever merely allows squeezing of the bulb to squirt gas into the carburetors. The lever is itself a valve and not a pump. Regarding Greg, my point was that he was incorrect about Clark Roberts and skookum point being incorrect. Both Clark and John gave answers that were accurate thus Greg was incorrect when he said: "To correct the incorrect answers above." He wasn't correcting anything but merely elaborating on what had already been said. The technical answer he gave thereafter was substantially correct. DaveH, You're no smart ass, you are correct about how things in general can rotate. You’ll get no argument from me. But the rotation in question has to do with the little red lever found on the motor being discussed. I say again, how else does this lever rotate if not about it's axis? Or more to the point: What difference does it make. It has nothing to do with this discussion. The inclusion of the phrase "rotates axially" is pointless and stupid.
Bigshot	posted 08-02-2002 11:19 AM ET (US) We are all right. You use it to somehow choke the engine and winterize and decarbonize the engine. HOORAY!
ShrimpBurrito	posted 03-13-2003 04:55 PM ET (US) So where does the fuel go when you use the primer bulb when the red lever is in the "normal" position?
JBCornwell	posted 03-13-2003 06:03 PM ET (US) Doesn't anyone have and read the owners manual? Red sky at night.. . JB
ShrimpBurrito	posted 03-13-2003 06:05 PM ET (US) I don't have one......
WhalerGoFar	posted 03-13-2003 06:47 PM ET (US) I know what the little red "do-whitchy" does now.....but I would like someone who owns a manual to tell me the position of the "do-whichy" when in normal operating mode and which way to rotate it when it is needed to be put into action. Assuming pointing to the rear of the motor is "0" and stright up is "2" and pointing to the front of the motor is "3" please advise. CMT
ducktwin	posted 03-14-2003 07:58 PM ET (US) "Normal" operating position is with the pointer on the valve pointed toward and parallel to the body of the solonoid. Turning 180 degrees (pointer pointed away from solonoid yet still parallel) is the manual start position.
Bigshot	posted 03-17-2003 10:05 AM ET (US) It will click into a light detent when in the correct running position.