I recently got a 2000 GSX RFI of unknown history; it was partially taken apart (down to starter which was hanging by positive cable), and had been sitting for 2-3 years. I am no mechanic, but attempted to put it back together, replaced with new gas, new oil. On initial starting attempt, I found out it was hydro-locked with oil. Then I cleaned oil out by turning it over with spark plugs out, and got it up and running on trailer - seems to run well now on trailer.
After putting it in water it does not want to start; backing it into water after starting it on trailer (out of water) it will only run while giving it gas, about 2000 rpm or higher.
I checked compression, both cylinders are right at 150 PSI.
I cleaned fuel injectors and fuel rail, and verified nice spray patterns from injectors.
I ensured that I was getting about 13-14 volts to battery from magneto when running briefly.
I inspected rotary valve and made sure timing alignment was good.
One odd thing I have noticed is that it seems to have water in exhaust much longer than another GSX RFI that I have (2001), even days after it was put in water, and (after having run 10 seconds or so after pulling it out of water). Perhaps related to that I noticed that the tell-tale hole on this 'bad' 2000 GSX RFI seems to put out much more water than the 'good' 2001 GSX RFI - I would have thought they ought to be about the same. It seems to me that it could be the engine is filling with water when I put it in the water... though I sure don't know for certain. Almost like the cooling water goes into the engine as it is supposed to, but isn't able to exit (like a plugged-up output hose or something maybe).
As a next guess, I replaced water regulator valve with known good one (from the 'good' 2001 GSX RFI) - same problem.
Latest note - when flushing with the hose, I briefly disconnected the water hose which goes from the cylinder head (exiting I think) to the exhaust manifold water jacket thinking the water would flow from the cylinder head input (flush hose connection) out this clyinder head exit hose - but when I did that not much if any water came out from the cylinder head exit hose, but I noticed a powerful stream of water coming out the exhaust manifold water jacket connection?? I thought the flow of water should be from the cylinder head towards the exhaust manifold water jacket? Or is it perhaps reversed since we are reverse flushing using the garden hose flush connection...? Any information about this would be appreciated.
I did notice that when I disconnected this hose, the water stream exiting the tell-tale was reduced quite a bit (though I thought it would completely go away - am surprised there is water coming through that exhaust manifold water jacket... Not sure of what path that water is coming from to flow OUT the exhaust manifold (the connection which is supposed to be connected to the hose from the cylinder head exit I think).
Also if anyone has a 'next guess' as to what might be the problem, I'd sure appreciate any thoughts/ideas on this...
After putting it in water it does not want to start; backing it into water after starting it on trailer (out of water) it will only run while giving it gas, about 2000 rpm or higher.
I checked compression, both cylinders are right at 150 PSI.
I cleaned fuel injectors and fuel rail, and verified nice spray patterns from injectors.
I ensured that I was getting about 13-14 volts to battery from magneto when running briefly.
I inspected rotary valve and made sure timing alignment was good.
One odd thing I have noticed is that it seems to have water in exhaust much longer than another GSX RFI that I have (2001), even days after it was put in water, and (after having run 10 seconds or so after pulling it out of water). Perhaps related to that I noticed that the tell-tale hole on this 'bad' 2000 GSX RFI seems to put out much more water than the 'good' 2001 GSX RFI - I would have thought they ought to be about the same. It seems to me that it could be the engine is filling with water when I put it in the water... though I sure don't know for certain. Almost like the cooling water goes into the engine as it is supposed to, but isn't able to exit (like a plugged-up output hose or something maybe).
As a next guess, I replaced water regulator valve with known good one (from the 'good' 2001 GSX RFI) - same problem.
Latest note - when flushing with the hose, I briefly disconnected the water hose which goes from the cylinder head (exiting I think) to the exhaust manifold water jacket thinking the water would flow from the cylinder head input (flush hose connection) out this clyinder head exit hose - but when I did that not much if any water came out from the cylinder head exit hose, but I noticed a powerful stream of water coming out the exhaust manifold water jacket connection?? I thought the flow of water should be from the cylinder head towards the exhaust manifold water jacket? Or is it perhaps reversed since we are reverse flushing using the garden hose flush connection...? Any information about this would be appreciated.
I did notice that when I disconnected this hose, the water stream exiting the tell-tale was reduced quite a bit (though I thought it would completely go away - am surprised there is water coming through that exhaust manifold water jacket... Not sure of what path that water is coming from to flow OUT the exhaust manifold (the connection which is supposed to be connected to the hose from the cylinder head exit I think).
Also if anyone has a 'next guess' as to what might be the problem, I'd sure appreciate any thoughts/ideas on this...
