I did manage to find a new part number that contains both filters/strainers from advance auto FS0112
https://shop.advanceautoparts.com/p/delphi-fuel-pump-strainer-fs0112/20772283-P?searchTerm=FS0112
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787 RFI low power
- Thread starter mattrourke
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I did manage to find a new part number that contains both filters/strainers from advance auto FS0112
https://shop.advanceautoparts.com/p/delphi-fuel-pump-strainer-fs0112/20772283-P?searchTerm=FS0112
mattrourke
Member
Sorry everyone. Been way too busy lately and haven't had a chance to come on here. Glad you got the fuel filters figured out and sorry I didn't get back to you.
I have not yet figured out the issue with this one but I found another 3d for sale close to me (7 hour drive), well close for what I'm used to in BC, Canada. Going to pick it up tomorrow and will try to figure out this other one over the winter, and if not, it will become a spare parts machine because I've been having trouble sourcing a lot of parts.
I will update this as I go through further testing etc.
I did pressure test my cracked exhaust pipe and seems to just be an external crack and not a crack on the inside water jacket so I will have that welded.
I have not yet figured out the issue with this one but I found another 3d for sale close to me (7 hour drive), well close for what I'm used to in BC, Canada. Going to pick it up tomorrow and will try to figure out this other one over the winter, and if not, it will become a spare parts machine because I've been having trouble sourcing a lot of parts.
I will update this as I go through further testing etc.
I did pressure test my cracked exhaust pipe and seems to just be an external crack and not a crack on the inside water jacket so I will have that welded.
mattrourke
Member
So i took my engine into a local guy who specializes in building race engines for cars and also rebuilds regular and performance snowmobile engines. He's been going through my engine and hasn't foudn anything alarming and says everything is excellent on it and would not recommend doing a rebuild as it is not needed. He is going to replace gaskets and a couple seals and make sure it is timed properly as he has seen similar snowmobile and seadoo engines that were out of time that had similar symptoms to mine.
Once i get it back and re-installed i will see what else i can find. I did order a Candoo Pro scanner so that i can further diagnose. Given that i will have the scanner, can anyone recommend specific diagnostics i should run with that tool to try and find my low power issue?
Once i get it back and re-installed i will see what else i can find. I did order a Candoo Pro scanner so that i can further diagnose. Given that i will have the scanner, can anyone recommend specific diagnostics i should run with that tool to try and find my low power issue?
@mattrourke I worked on 787 RFI last year which would not accelerate past half throttle in the water, I did all of the troubleshooting listed on the various forums and everything checked out correctly.
New injectors finally fixed my issue, and maybe a replacement fuel module from Westside Power Sports.
New injectors finally fixed my issue, and maybe a replacement fuel module from Westside Power Sports.
mattrourke
Member
I swapped injectors over from my good seadoo and unfortunately it didn't make a difference as well as swapping over the fuel pump. I'm not sure if I swapped the fuel module... I will have to look at it and see if I remember swapping it.
mattrourke
Member
I see now that the fuel module is part of the whole sending unit that I also swapped over from the other one.
mattrourke
Member
The shop, and myself were worried that since neither of us knew the history of the engine and it has not run properly since I bought it that maybe the previous owner had messed with it and not set the timing properly.
Good call, I don't trust any new to me ski. You never know what the previous owner did.
mattrourke
Member
Well, @Pedec mentioned the exhaust pipe earlier as many people with the 2005 have a rubber hose that collapses. The 2004 has a stainless pipe with water jacket and a visual inspection found it to be fine both externally and using a flashlight to look down it while it was still in the ski. I ran a scope down it and sure enough swelled mostly shut. Please tell me if you think this would not be the problem but my limited knowledge of engines would still suggest this would describe my symptoms - idle and low speed are fine but will not hit higher rpms and feels like it is bogging.
mattrourke
Member
None of these extension pipes available anywhere so I'm going to cut the outer skin off of this one have the inner pipe cut out and a new one welded in and then have the outer skin welded back on and pressure tested. Really the only option right now. Spoke with a fab shop this morning and they said if I do the grunt work of cutting the outter pipe off and cleaning it up nice for them they will do the welding and shouldnt cost much more than a replacement one if it were available. I'll try to take pictures along the way.
mattrourke
Member
Well I cut the outer pipe off of the exhaust pipe and here is what it looks like on the inside.
mattrourke
Member
I think I will pull the impeller and replace the wear ring etc while I have this thing in pieces and can hopefully put it back together confidently knowing that it has been checked over from front to back... Given that I didn't remove the engine mounts that are bolted to the hull, is checking the engine alignment even necessary? I did order the special alignment tool.
mattrourke
Member
Will do. It looks pretty basic to do and I did order some shims just in case.
mattrourke
Member
I dropped the engine back in and used the alignment tool. I had to remove a couple of shims to line it up so obviously it was worth doing. Got the welded pipe back and put back in but didn't manage to put the tuned pipe back in yet.
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