1994 1995 GTX question

[JoeyDeluca]

I have a 1994 GTX with the 657 engine. I was curios about where the 2 stroke oil actually goes. I know one tube runs from the reservoir to right be low the carbs to the plump, which pumps it into the intake. Then I see another line where do these lines go? Also how is the rotax valve lubricated? Just from the pump injected in the intake? Thank you as Im just trying to figure out everything about this engine.

 

[AdamXP800]

The RV is oiled by that other line you see coming off the oil tank.

 

[AdamXP800]

One line is to your oil pump, the other goes to the oil bath for your RV

 

[JoeyDeluca]

Wow that was very fast, so the RV passes through the oil bath as it rotates? Also the other line is the return line, is that returning back from the oil bath?

 

[DooWacka]

The RV doesn't pass through the oil bath. The bath is for the gear that turns the RV. The gear meshes with another gear on the crank, so it needs to be immersed in oil since it pulls it's power off at 90 degrees to the crank. The RV is lubricated directly with 2 small injectors with their own small hoses. Yes, there is a "return" line from the oil bath.

 

[Minnetonka4me]

Yup im not sure why its that way, as it doesnt actually cycle or pump the oil thru the cavity.

 

[DooWacka]

I thought that the motion of the gears in the cavity produces a slight pumping and circulation of the oil.

 

[ueww40]

The RV doesn't pass through the oil bath. The bath is for the gear that turns the RV. The gear meshes with another gear on the crank, so it needs to be immersed in oil since it pulls it's power off at 90 degrees to the crank. The RV is lubricated directly with 2 small injectors with their own small hoses. Yes, there is a "return" line from the oil bath.

Are you talking about the 2 small hoses that go to the injectors in the intake manifold or are there another 2 small hoses somewhere that oil the RV? Also I read somewhere on this forum here that you have to change the oil for the counter balance shaft or something like that, if the doo gets submerged and the engine fills with water. I too have a 1994 GTX with the 657 engine. Does this apply to this engine?

 

[mikidymac]

To clarify, there is one 10mm oil line from the tank to the oil pump on the engine. The pump then pumps into the two small 3/32" lines to the intake manifold. The intake manifold fittings provide oil to the actual round rotary valve, crank and cylinders.
The 12mm hose from the oil tank provides oil to the side of the block that fills a sealed cavity in the middle of the engine that is flooded with oil to lubricate the crank gear and drive gear that turns the rotary valve. This cavity is just gravity fed and not under pressure. The last 10mm oil line that connects from the side of the block to the top of the oil tank is just a vent that equalizes the pressure from the tank to the engine.

Your engine does not have a counterbalancer. Only the 787 and 951 have the balancers.

 

[ueww40]

Thank you very much. Can't get much clearer than that. One more question about my 1994 GTX. So you are saying if water gets into the engine all I have to worry about is to get the water out of the engine, get the engine running again and I am good to go for another day on the river, correct?

 

[Coastiejoe]

Thank you very much. Can't get much clearer than that. One more question about my 1994 GTX. So you are saying if water gets into the engine all I have to worry about is to get the water out of the engine, get the engine running again and I am good to go for another day on the river, correct?

Pretty much,,,, Pull the plugs if it doesn't crank. Do NOT stand above the plug holes as the water comes out under GREAT force. Once you clear the cylinders, then try to start like normal. It helps to have a few sets of plugs on hand but is not a deal breaker without them.

Once you get it started, get it out on the water and run it for 30 minutes. This will get the entire block up to temp and remove the residual water.

If you flood the engine with water, you want to get it running ASAP as the water will destroy the engine. Once rusts starts it can easily wipe out the motor. And rust wil start within 24 hours..