Fogging Engine with Schrader Valve Attachment

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Author Topic:   Fogging Engine with Schrader Valve Attachment

onlyawhaler posted 12-05-2005 02:16 AM ET (US)
I would appreciate some help. On older OMC engines I have read here that fogging oil applied through the carbs can used via a schrader valve if available.
I have an 1988 Johnson 150 and have been removing the cover from the carbs and squirted directly into the carb throats.
I am assuming the schrader valve is an option or after market item. Is it cut into the fuel line inside the cowling area? Is this something I can install myself? Sounds like a much easer way to fog the carbs than what I am doing.
Thanks
Sterling
bsmotril posted 12-05-2005 09:23 AM ET (US)
A Schrader Valve is simply the type of valve you have on your auto tire to add air. Some newer airboxes have them in front of the carbs. An inexpensive mod that you can do yourself is to simply drill a hole in the plastic airbox in front of each carb throat. Make it big enough to insert the straw from the can of fogging oil. Use Stainless self tapping screws with a rubber washer under a stainless washer to seal the holes under normal usage. Remove the screws to fog. BillS
jimh posted 12-05-2005 09:39 AM ET (US)
You are probably referring to my article on winterization procedures for OMC engines. See:
Winterizing Older OMC Two-Stroke Outboards
http://continuouswave.com/whaler/reference/winterizeOMC.html
This question would have been very appropriate as a follow up question to that article. There is a message thread provided for follow-up questions. See:
http://continuouswave.com/ubb/Forum3/HTML/009831.html
The Schrader valve inlet was an OMC design, not some after-market add on. To the best of my knowledge it was standard equipment. It was not offered as an option; it just came with the motor. OMC outboards are quite well engineered and have many innovative features not found on competitor's motors.
Your outboard's owner's manual should have advice on how to connect to the Schrader valve fitting if you engine has one. I don't know the details of which motors have them.
hookum posted 12-05-2005 11:22 AM ET (US)
My Engine is a 1989 Johnson 140 and did not come with the schrader valve. I bought the valve from my Johnson Dealer and it is not after market. The instructions come with the valve and it is very easy to install.
Hookum
Tom W Clark posted 12-05-2005 11:30 AM ET (US)
My Johnson 150 hp V-6, which I bought new, did not come with this valve. One time when the motor was in for a tune-up the mechanic installed this valve and told me I could use it for fogging the motor. The expense was trivial.
It is very easy to buy this part and install it. Visit your local BRP dealer.
Tom W Clark posted 12-05-2005 11:31 AM ET (US)
I should add that my Johnson 150 hp was a 1990 model.
kingfish posted 12-05-2005 11:54 AM ET (US)
The part that has the Schrader valve is the primer solenoid cap. I know because I have the primer solenoid and a cracked cap from my 1992 Evinrude 225 sitting on my desk while I'm waiting for a new cap to be delivered. Since I've only seen mine, I assume but don't know for sure that there are two caps available for this primer solenoid, one with the schrader valve (and manual valve), and one with no valve.
If this is not the case, then the entire primer solenoid might have to be replaced with a different primer solenoid that has the valved cap. I have the OMC/Bombardier part number for the valved cap if it would be of help.
John
Don88outrage posted 12-05-2005 12:53 PM ET (US)
As stated above it's an inexpensive and very simple item to install, though I consider it's use for fogging secondary to it's value for injecting BRP engine tuner. You can probably get away with not fogging an engine but carbon build up will destroy it. My 88 Johnson 150 gets 2-3 cans run through a season and you can literally see the carbon running out the lower drain holes. 965 hours and still a great running motor.
onlyawhaler posted 12-05-2005 01:53 PM ET (US)
Thanks for the help. I just ordered the unit from my dealer. Less than $12 dollars. A great upgrade and timesaver
Thanks
Sterling
jimh posted 12-05-2005 08:46 PM ET (US)
My Evinrude V6 is a 1992 and presumably came with the Schrader valve. It sounds like kingfish's 1992 engine also had it. Perhaps c.1992 is when they were introduced. It sounds like they can be retrofitted to earlier motors. That is good to know!

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Author	Topic: Fogging Engine with Schrader Valve Attachment
onlyawhaler	posted 12-05-2005 02:16 AM ET (US) I would appreciate some help. On older OMC engines I have read here that fogging oil applied through the carbs can used via a schrader valve if available. I have an 1988 Johnson 150 and have been removing the cover from the carbs and squirted directly into the carb throats. I am assuming the schrader valve is an option or after market item. Is it cut into the fuel line inside the cowling area? Is this something I can install myself? Sounds like a much easer way to fog the carbs than what I am doing. Thanks Sterling
bsmotril	posted 12-05-2005 09:23 AM ET (US) A Schrader Valve is simply the type of valve you have on your auto tire to add air. Some newer airboxes have them in front of the carbs. An inexpensive mod that you can do yourself is to simply drill a hole in the plastic airbox in front of each carb throat. Make it big enough to insert the straw from the can of fogging oil. Use Stainless self tapping screws with a rubber washer under a stainless washer to seal the holes under normal usage. Remove the screws to fog. BillS
jimh	posted 12-05-2005 09:39 AM ET (US) You are probably referring to my article on winterization procedures for OMC engines. See: Winterizing Older OMC Two-Stroke Outboards http://continuouswave.com/whaler/reference/winterizeOMC.html This question would have been very appropriate as a follow up question to that article. There is a message thread provided for follow-up questions. See: http://continuouswave.com/ubb/Forum3/HTML/009831.html The Schrader valve inlet was an OMC design, not some after-market add on. To the best of my knowledge it was standard equipment. It was not offered as an option; it just came with the motor. OMC outboards are quite well engineered and have many innovative features not found on competitor's motors. Your outboard's owner's manual should have advice on how to connect to the Schrader valve fitting if you engine has one. I don't know the details of which motors have them.
hookum	posted 12-05-2005 11:22 AM ET (US) My Engine is a 1989 Johnson 140 and did not come with the schrader valve. I bought the valve from my Johnson Dealer and it is not after market. The instructions come with the valve and it is very easy to install. Hookum
Tom W Clark	posted 12-05-2005 11:30 AM ET (US) My Johnson 150 hp V-6, which I bought new, did not come with this valve. One time when the motor was in for a tune-up the mechanic installed this valve and told me I could use it for fogging the motor. The expense was trivial. It is very easy to buy this part and install it. Visit your local BRP dealer.
Tom W Clark	posted 12-05-2005 11:31 AM ET (US) I should add that my Johnson 150 hp was a 1990 model.
kingfish	posted 12-05-2005 11:54 AM ET (US) The part that has the Schrader valve is the primer solenoid cap. I know because I have the primer solenoid and a cracked cap from my 1992 Evinrude 225 sitting on my desk while I'm waiting for a new cap to be delivered. Since I've only seen mine, I assume but don't know for sure that there are two caps available for this primer solenoid, one with the schrader valve (and manual valve), and one with no valve. If this is not the case, then the entire primer solenoid might have to be replaced with a different primer solenoid that has the valved cap. I have the OMC/Bombardier part number for the valved cap if it would be of help. John
Don88outrage	posted 12-05-2005 12:53 PM ET (US) As stated above it's an inexpensive and very simple item to install, though I consider it's use for fogging secondary to it's value for injecting BRP engine tuner. You can probably get away with not fogging an engine but carbon build up will destroy it. My 88 Johnson 150 gets 2-3 cans run through a season and you can literally see the carbon running out the lower drain holes. 965 hours and still a great running motor.
onlyawhaler	posted 12-05-2005 01:53 PM ET (US) Thanks for the help. I just ordered the unit from my dealer. Less than $12 dollars. A great upgrade and timesaver Thanks Sterling
jimh	posted 12-05-2005 08:46 PM ET (US) My Evinrude V6 is a 1992 and presumably came with the Schrader valve. It sounds like kingfish's 1992 engine also had it. Perhaps c.1992 is when they were introduced. It sounds like they can be retrofitted to earlier motors. That is good to know!