2005 gti le rfi 787 over oiling

[kluttrell169]

Purchase this unit looking for help diagnose
It can not run in water checked compression before purchasing both cylinders are at 150 , Not sure if the pump is bad or there is something else I need to look into but my spark plugs are covered in oil. I cleaned out the cylinders replaced spark plugs started unit runs good on the trailer but as soon as it hits the water it starts to die and finally will not start removed spark plugs again and completely covered in oil.

 

[mikidymac]

IF your oil pump is adjusted correctly then your inner crank seals are shot and you will need a new reman crankshaft.

 

[kluttrell169]

Thank you I’ll look into it, who would be a good company to purchase the crankshaft and I would assume complete rebuild kit for this engine.

 

[mikidymac]

That is tough at the moment as everyone is backed up.

 

[kluttrell169]

Found reman complete engine for 1100 thinking with my time and money with crank rebuild kits being about 600 might be better getting complete engine already have 2000 into this unit as it sits hopefully it is worth the total 3500 I’ll be putting in the unit to make it water ready

 

[kluttrell169]

Thanks for y’all input I have decided to order the engine.

what parts should I purchase to help with reassembling unit

 

[mikidymac]

Where did you order an engine from?

 

[mikidymac]

You should send the injectors out to be checked and cleaned per @etemplet .
I would also change the in-tank fuel filters.

 

[kluttrell169]

SBT

 

[kluttrell169]

Where did you order an engine from?

SBT

 

[kluttrell169]

You should send the injectors out to be checked and cleaned per @etemplet .
I would also change the in-tank fuel filters.

Thanks I’ll look into finding someone who can take care of them

 

[markg612]

There are some repair options in this thread short of a new engine or crank

787 crank seal leak

 

[etemplet]

Best to verify what is going on before doing anything. I have lots of experience with "over oiling", as you call it, and it comes from the rotary valve chamber. Right now you don't know why the engine is stalling. Put new plugs in there. When the engine starts, how much smoke is coming out of the exhaust? If it isn't fogging the yard, you don't have an oil problem. I would rule out a fuel problem first. Leaking injector perhaps or a no spark issue.

If you have a real oil problem the ski won't start. It will lock up. Oil will shoot out of the spark plug holes when you remove the plugs. Once I get a ski like that running, and it will fog a 50' X 50' section of yard, I simply install a plastic butterfly valve in the rotary valve feed line. Problem solved. Ride it like you stole it. Good Luck.

 

[markg612]

Best to verify what is going on before doing anything. I have lots of experience with "over oiling", as you call it, and it comes from the rotary valve chamber. Right now you don't know why the engine is stalling. Put new plugs in there. When the engine starts, how much smoke is coming out of the exhaust? If it isn't fogging the yard, you don't have an oil problem. I would rule out a fuel problem first. Leaking injector perhaps or a no spark issue.

If you have a real oil problem the ski won't start. It will lock up. Oil will shoot out of the spark plug holes when you remove the plugs. Once I get a ski like that running, and it will fog a 50' X 50' section of yard, I simply install a plastic butterfly valve in the rotary valve feed line. Problem solved. Ride it like you stole it. Good Luck.

Gene--how long have you left the valve on after shut down before there's enough oil back in the crankcase from the seals leaking? I've seen some folks mention a couple of days, others shut it off every ride, and others morning on, evening off--thoughts?

 

[mikidymac]

Gene--how long have you left the valve on after shut down before there's enough oil back in the crankcase from the seals leaking? I've seen some folks mention a couple of days, others shut it off every ride, and others morning on, evening off--thoughts?

It depends on how bad the seals are. If you can leave it for a few days to a couple weeks then the valve would work. If your seals are so bad you have to shut it off every day or the engine floods then your only option is a rebuilt crank because the seals are shot.

 

[etemplet]

Gene--how long have you left the valve on after shut down before there's enough oil back in the crankcase from the seals leaking? I've seen some folks mention a couple of days, others shut it off every ride, and others morning on, evening off--thoughts?

You have to work that out with each individual ski. My wife's ski will lock up if I leave the oil flow for 10 days. It only takes a few ounces to successfully lock up an engine. I definitely leave the oil valve open for the weekend. If that thing fills up overnight that's a big leak. Cool thing about it is... if you forget to open the valve it's not the end of the engine. I think you can judge by the amount of smoke you're pumping out. Her spark plugs don't foul or anything. Ski runs great so this ole boy and fixin Shite cuz it ain't broke. LOL

 

[etemplet]

I actually considered putting oil in a graduated cylinder and connecting it to the Rotary Vavle oil line and leaving it for a period of time that way I could determine the size of the leak. I like numbers. I also considered putting some transmission "Stop Leak" in the oil supply to swell the seals. I think the seal leak on my wife's ski is because I did not put sealant on the inner lip seals when I installed the used crank. I use sealant on the inner seals on every crank I replace now. Good Luck !!

I'm gonna make a bleed tool to insert into the spark plug holes on these skis when I have this problem. I get tired of oil getting everywhere. That would also be usable for water flooded engines.

 

[markg612]

I actually considered putting oil in a graduated cylinder and connecting it to the Rotary Vavle oil line and leaving it for a period of time that way I could determine the size of the leak. I like numbers. I also considered putting some transmission "Stop Leak" in the oil supply to swell the seals. I think the seal leak on my wife's ski is because I did not put sealant on the inner lip seals when I installed the used crank. I use sealant on the inner seals on every crank I replace now. Good Luck !!

I'm gonna make a bleed tool to insert into the spark plug holes on these skis when I have this problem. I get tired of oil getting everywhere. That would also be usable for water flooded engines.

I bought an air powered one for some MB injector work, that is a reverse of a sprayer–the suction line runs into the bottle and the discharge air runs through a disbursing screen