walmart tcw3 supertech

[steplift20]

never, you would never see a fourstroke on my boat

[kamikaze]

Not to Ruffle any feathers, but VRO operate off of crank case pressure period.

The warning circuit uses tach inputs to verify sufficient oil is being pumped as required per engine RPM's. So if your tach circuit is shot it doesn't mean the VRO isn't functioning, it just means you won't know when it does until it's to late.


From http://continuouswave.com/whaler/reference/VRO.html

The VRO's electronic circuitry compares the RPM of the engine to the number of pressure pulses from the oil pump piston. As the oil flows into the fuel area, the pressure moves a small piston that actuates a steel pin in the alarm module. The pin's movement is detected electronically and "counted." If the engine revolutions exceed the preprogrammed oil pulse ratios, the warning horn is activated sounding a rapid on and off sequence.

I'm with Phester. VRO's rock! but they do need to be maintained like anything on a boat. Unfortunately they are expensive and they aren't very well understood which only adds to the topic raising its head from time to time.


Kamikaze

[steplift20]

i will tell you why oil 8dollars a gallon
and thats it
plugs, can change them in 3 minutes and no gapping
winterize done in 30 minuters done

[wpearch]

Originally Posted by steplift20

never, you would never see a fourstroke on my boat

I was just being a wise guy the 8000 to 10000 price tag is also kind of a hold back

[76GMC1500]

My limited experience with 2-stroke oils is in 2-stroke dirt bike engines, but it has been an interesting experience. *I generally run whatever "quality" oil is priced right or I can get my hands on. *This ranges from $6 a quart Yamalube 2-R to $16.95 a quart Bel-Ray HC-1. *With an average lifespan for a piston of around 20 hours, it's pretty easy to see any accelerated or reduced wear. *

My conclusion so far is that I have seen no difference in wear no matter what oil I run except when I blow a crankshaft seal and start sucking crankcase oil. *

What I have seen are differences in cleanliness of the engine. *A major part of 2-stroke motorcycle maintenance is cleaning the exhaust valves. *My particular bike is notorious for fouling exhaust valves. *After running some of the brands of synthetic oils, my exhaust valves come out cleaner than they go in. *Of course, outboards don't have any such thing but keeping the ring grooves clean is important to maintaining proper ring seal. *My observations so far have been that the synthetic blends do carbon up some in the ring grooves, on the piston crown, on the exhaust valves, and on the combustion chamber. *Redline synthetic does leave deposits on the piston crown, none in the combustion chamber, minimal in the ring grooves, and some on the exhaust valves. *Bel-Ray HC-1 leaves some in the combustion chamber, minimal on the crown, none on the exhaust valves, and minimal in the ring grooves. *Amsoil Dominator performs very similarly to Redline. *Amsoil Interceptor is the interesting one. *Everything in the cylinder is absolutely spotless after the pistons entire lifetime of 20 hours. *I think the last engine we pulled apart had one fleck of carbon under the spark plug. *It's also one of the cheaper oils at $10.95 a quart.

I've also noticed that if you overheat the crown, you'll get carbon build-up on that hot spot regardless of what oil you burn.

Basically, if you have a boroscope available, you should use it to determine what oil keeps your engine the cleanest and run that oil. *Don't worry about brand, they all seem to do fine at wear protection.

[cterrebonne]

Originally Posted by kamikaze

I'm with Phester. *VRO's rock! but they do need to be maintained like anything on *a boat. *Unfortunately they are expensive and they aren't very well understood which only adds to the topic raising its head from time to time.
Kamikaze

they are close to 300 retail. they also make rebuild kits for the vro pumps for all three parts of it. also the vro2 pumps which all of the other v-6, v-4 pumps use superceed to that pump. and if anyone was curious if your fuel side goes out and you dont want to rebuild it. you can order a vro with out an oil side.

[cterrebonne]

i did not know dirt bikes had exhaust valves. that is pretty cool. like a detroit diesel

[76GMC1500]

Well, not really like a Detroit. *They usually work by covering a portion of the ports to vary the timing/area or by opening and closing sub-ports to change the resonance of the pipe to give a broader power band. *They open based on RPM. *That is why they foul up, they aren't always moving (which scrapes the carbon off) if the motor spends a large portion of its time above or below the rpm at which they open. *That valve protruding into the exhaust flow tends to collect a lot of carbon.

Oh yeah, I'm not suggesting you run motorcycle oil instead of an outboard oil, I was just explaining some of the differences you may see between brands.

[cterrebonne]

like the rave and power valves in yam and seadoo waverunners?

[76GMC1500]

Probably, I'm not particularly familiar with newer skis, but I doubt they're much different.