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Random Quote: To err is Human said the rooster as he climbed off the duck.
I hear alot about spraying down ones engine with Corrision block, CRC, etc. How much do you spray on? Are there areas that you should not spray? Should I take off the ignition coil cover? Any products better than others? Thanks.
no product is better than the other - sounds like you did enuf reading - a light coat is all you need - I stay away from the top of the motor if there is a belt...
CRC 656 is the cheapest and works well - buy it buy the gallon at $25
I have sprayed down all my outboards and now inboard for the past 25 years. I now use the Wal-Mart brand since it is only around a $1.25 per can. After every trip,after I wash down the boat . pump the bilge, and then I spray the engine ,trans ,and V- drive. Spray directly on coils ,caps,etc,along with in my case the fuel shut off valves and the seacock.[I close the seacock every time I leave the boat. Not only does it keep it "working",but I never had a dock sinking due to failure of a hose or fitting.}
After the spraydown ,i put a tarp ovet the engine that is very loose fitting but keps any water from rain dripping on the engine from the hatch.
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I have been spraying my outboards down for years. In the late 1980's I used 656 on an Evinrude and it did not get the results I did on later model Yamahas using Corrision Block or T-9 but there could be many factors why that may or may not involve the spray itself. As GlenE stated I use it very sparingly around the top of the motor. Also keep it away from any of the O2 sensors like the Yamaha OX66 had on the upper bank (it will toast it).... Definitely a good preventative maintenence item.
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This will open up the proverbial can of worms, but is there any evidence that this type of maintenence has any significant reduction in engine failures. I do realize that most will get a warm and fuzzy cheap insurance feeling from this maintenance, but does it do anything besides making the visible parts look newer? - just curious.
In my experience, spraying anything like Boeshield T9 on a moving or dynamic electric part/switch can inhibit proper functioning ... it gums up the action.
__________________ [red]MISS TEAK[/red], 25' Parker mod-V Sport Cabin "Life's too short to own an ugly boat ..." www.classicparker.com
This will open up the proverbial can of worms, but is there any evidence that this type of maintenence has any significant reduction in engine failures. I do realize that most will get a warm and fuzzy cheap insurance feeling from this maintenance, but does it do anything besides making the visible parts look newer? - just curious.
I doubt it does anything but keep parts from rusting and corroding under the cowling and keep anything that moves free from corrision (like throttle and cable connections). Engine failures are an internal issue...
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"Looking newer" is good enuf for me - I pulled a cover on a 3 year old motor a few weeks ago that had never been sprayed or washed - full of crud, rusted bolts and the like - looked 10 years old..also techs like an engine that looks new as it's easier to work on and there's not as much Z time getting rusted stuff loose...adds huge to resale also
CRC Heavy Duty Corrosion Inhibitor. Goes on thin, penetrates well, and doesn't stay sticky. Have used it on jet skis, I/Os, outboards and trailer tire studs and elctrical. Never any corrosion or elctrical probs.
where is the oxygen sensor found on a 115 merc 4 stroke and what does it look like? I plan on giving the engine the once over w/ crc. What do you guys think of using the salt away or salt x on the trailer to inhibit corrosion? Thanks.
I use SuperLube synthetic spray. It has excellent corrosion inhibitors and it is non flamable. I don't think it is good practice using flamable lubricants in areas subject to heat and sparks.
The Evinrude "anto corrosion bomb" that many dealers in this area spray the motor down with does anything but make it look new; it looks like it has "stuff" all over the engine..because it does. The upside to that is it keeps anything it touches from rusting, and it only ever needs to be done once.
SeaJay - 8/19/2008 10:46 AM This will open up the proverbial can of worms, but is there any evidence that this type of maintenence has any significant reduction in engine failures. I do realize that most will get a warm and fuzzy cheap insurance feeling from this maintenance, but does it do anything besides making the visible parts look newer? - just curious.
No.... Never heard of it doing anything for the motor...
I have never done it in my nearly 40 years of outboard ownership. When I took delivery of my bay boat, the tech going over the check sheet with me on the motor told me when I spray protectant on the motor to avoid getting it on or around the oxygen sensor. I asked if it was something I needed to do, and he said no. So I leave this to the tech to do if they feel the need. Inboard motors with polished aluminum jewelry all over them like my old ski boat, yes, everytime it was used.
IMHO, any 3 year old motor that looks like it's 10 years old under the cowling has a bad cowling.
This will open up the proverbial can of worms, but is there any evidence that this type of maintenence has any significant reduction in engine failures. I do realize that most will get a warm and fuzzy cheap insurance feeling from this maintenance, but does it do anything besides making the visible parts look newer? - just curious.
Of course it not going to prevent engine failure but it does help prevent rust. I have a 1994 Johnson which under the crown still looks almost new and I spray it down a couple of times a year not after every use. I use WD 40 which some say breaks down the wiring but after 11 years I have no signs of that and if I need to replace a part I do not have to fight rusty bolts or nuts.
i spray engine down each year at a minimum. engine looks new and prevents rusting on all parts. shield belts and inside pulleys but spray their housings. i have friends new to boating and they are surprised to hear about this process......the bigger surprise is to look at their engines only after a year in the saltwater and the rust that is growing on every little small area of their inboard.
Thanks for all the great info. Does anyone spray down the bilge area...such as elecrical wiring, housing for water/fuel seperator, etc.? I can see this area being very prone to rust.
Thanks for all the great info. Does anyone spray down the bilge area...such as elecrical wiring, housing for water/fuel seperator, etc.? I can see this area being very prone to rust.
I spray everythig that is metal below the decks with CRC 656 every 60 days or so - pumps, wiring, everything behind the dash, etc...get CRC by the gallon and no aerosol...put it in a home depot spray bottle and set it for "stream" and you can hit stuff you can't reach or touch under the deck...(like tab motors etc)
I "baste" mine with CorrsionX a couple times a year. It still looks about new and it does protect from corrosion. I spray all of the metal, and skip most of the plastic. I use a light coat over everything.
Spraying down outboard with protectant 
