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Hello all. I have read this forum for most of the summer and it has been a big help getting a free ski up and running. Free ski came with the disassembled engine in a box with all the spare parts thrown in for good measure. Ski is now running and still has a few issues. It will max out at 4500 rpm at which point it will just hang there until I pump the primer(no choke)2 times. Then it will launch and rev up to 6500 rpms and take off. Very fast. Slow back down and it will rev back up to 4500 rpm until the primer is pumped and you are off again. Carbs have been rebuilt. Pop off pressure is 32psi on both. Drained all the fuel, removed the baffle and checked it for cracks, all fuel lines replaced, tank pressure tested, selector removed and gone over, inline fuel filter installed in place of factory filter. Compression is 150 psi on both cylinders. New coil installed.
Since replacing the pistons and cylinders we have found that it was only running on the mag cylinder due to bad coil and that the exhaust hose was separated internally. This separation filled with water and was blocking the exhaust. We replaced both the coil and hose. It now runs but is fussy when taking off and has the rpm problem.
The return hose from the carbs is clear and I have noticed a lot of bubbles in it when running. The fuel filter will almost run dry which is kind of strange. We have run it without the filter just to see what it would do and there was no difference. Any help would be appreciated.
Since replacing the pistons and cylinders we have found that it was only running on the mag cylinder due to bad coil and that the exhaust hose was separated internally. This separation filled with water and was blocking the exhaust. We replaced both the coil and hose. It now runs but is fussy when taking off and has the rpm problem.
The return hose from the carbs is clear and I have noticed a lot of bubbles in it when running. The fuel filter will almost run dry which is kind of strange. We have run it without the filter just to see what it would do and there was no difference. Any help would be appreciated.
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