2009 stingray
Cadet
- Joined
- Aug 29, 2024
- Messages
- 21
hey all, i got a bugger hear, took over this job after the owner felt their mechanic was just throwing parts at this problem, . no scanners, no fuel pressure gauges just flying by the seat of their pants.
anyways, after replacing the impeller, then the entire raw waterpump assy, then the manifolds/risers the alarm kept sounding. then it stopped running all together, so they sold the client on a new fuel pump, again, no gauges, new fuel pump in and now no fuel getting to the pump, mechanic says possible blockage in the fuel delivery, the mechanic hooks up a seperate tank and the boat runs fine, mechanic says fuel supply tube or anti siphon valve, which is strange cause the boat has twin engines and the other engine runs fine.
enter me, i back trace the fuel lines and i get to a fuel manifold with 2 3 way valves, one for each engine, i disconnect the lines and find that the valve for the trouble engine is blocked, the only way for fuel to flow is to turn the valve partially in between 2 options, so handle facing right feeds from right tank, handle facing left feed from left tank, handle facing down feeds from both tanks, on this valve, you have to put the handle in between down and right to get flow.
i took the valve apart and found the internals not lining up properly. i reassembled the valve and it worked fine.
engine ran fine although a bit of a miss, nothing significant but i felt it, i did a cylinder balance test and all cylinders were responding. i plan to go back and do a full compression test but for now i replaced the cap/rotor due to corrosion but it did little to help the rough idle.
anyways the customer was out on the boat tonight and the engine in question started acting up. sluggish and no power and the beep, ah yes the beep.
1 beep every 5-7 seconds. all gauges on dash read ok, nothing out of the ordinary. they limped the boat back to the dock and here she sits. .
i'm thinking it may be the sensors on the risers but when i ran the boat, no beeps, no codes, so ill be back to check further but id like to have something to go with.
anyways, after replacing the impeller, then the entire raw waterpump assy, then the manifolds/risers the alarm kept sounding. then it stopped running all together, so they sold the client on a new fuel pump, again, no gauges, new fuel pump in and now no fuel getting to the pump, mechanic says possible blockage in the fuel delivery, the mechanic hooks up a seperate tank and the boat runs fine, mechanic says fuel supply tube or anti siphon valve, which is strange cause the boat has twin engines and the other engine runs fine.
enter me, i back trace the fuel lines and i get to a fuel manifold with 2 3 way valves, one for each engine, i disconnect the lines and find that the valve for the trouble engine is blocked, the only way for fuel to flow is to turn the valve partially in between 2 options, so handle facing right feeds from right tank, handle facing left feed from left tank, handle facing down feeds from both tanks, on this valve, you have to put the handle in between down and right to get flow.
i took the valve apart and found the internals not lining up properly. i reassembled the valve and it worked fine.
engine ran fine although a bit of a miss, nothing significant but i felt it, i did a cylinder balance test and all cylinders were responding. i plan to go back and do a full compression test but for now i replaced the cap/rotor due to corrosion but it did little to help the rough idle.
anyways the customer was out on the boat tonight and the engine in question started acting up. sluggish and no power and the beep, ah yes the beep.
1 beep every 5-7 seconds. all gauges on dash read ok, nothing out of the ordinary. they limped the boat back to the dock and here she sits. .
i'm thinking it may be the sensors on the risers but when i ran the boat, no beeps, no codes, so ill be back to check further but id like to have something to go with.
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