I can test them but I'm almost certain it isn't coil since I already changed that out for a OCD rebuilt w/ new wires, plugs etc. from JM. Battery is relatively new and ground is tight, I ground to stator bolt so I know it's good.
Super Jet Running out of ideas... Superjet issue
- Thread starter ///M3
- Start date
I can test them but I'm almost certain it isn't coil since I already changed that out for a OCD rebuilt w/ new wires, plugs etc. from JM. Battery is relatively new and ground is tight, I ground to stator bolt so I know it's good.
550headache
tobacco grower
- Location
- tobacco valley
Also, unplug the stop wire. Lots of problems can be had from a failing stop switch!
Sent from my iPad using Tapatalk
Sent from my iPad using Tapatalk
start/stop switch is brand new, along with the ebox side harness
- Location
- Lemoore, CA
Did you check fuel pickup to make sure it isn’t partially blocked?
Its tougher to check with a cold fusion tank but I am going to go through that this week. Edit: tried with on and reserve and ran the same on both so doubting its pickups. Also going to try a different set of reeds. I’ll report back.
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Quinc
Buy a Superjet
- Location
- California
Looks/sounds rich. One of the needles sticking open?
- Location
- Braapp factory
Take air filters off and check carb butterflies are in sync and shafts aligned, grub screws tight. One may not be aligned / loose
Neither were stuck open when I took the carbs apart to clean them. Also didn’t stick while performing multiple pop off tests.
carbs are synced. Triple checked
- Location
- Reno,NV
i hate to say this but just in case , did u exchange fuel in tank.....water in tank ??
yep I emptied the tank and put fresh in
- Location
- Braapp factory
Check that the butterflies stay aligned under load, I’ve seen where they “twist on the shaft coupler” when ski in water and throttle pulled, returning to correct position on the scissor stand - took a while to find that, ski ran fine out of water but given a handful under load it dropped onto one cyl as one butterfly closed
I will check that but the ski runs the same out of water and in water
- Location
- Rochester, NY
Have you taken the head off and checked the pistons? You say it sounded like it was running in 1 cylinder, well maybe it is. I had a similar situation and the bottom half of one of the pistons was missing. Fortunately the pieces must have all exited out the exhaust, and replacing the piston did the trick.
would it still have exactly 170 comp in both holes?
Jcary85
Site Supporter
- Location
- Glenmoore pa
Have you had the front cover off? Checked the ground wire? The only ground to the Ebox is going into the front cover. Maybe temporarily try a secondary ground from battery to Ebox to see if that’s the issue. Would likely be more intermittent though.
- Location
- Rochester, NY
I seem to recall my compression being the same in each cylinder as well. Think it was apx 175 psi (girdled head). Which was misleading to say the least, given that half of 1 piston was missing. I know removing the head is a pain since you need to replace the gasket, but given all you have tried so far, you may be at the point to take a look inside the motor :-(
- Location
- Rochester, NY
I checked the thread on my issue and the readings were 150 and 160 psi... so not quite the same.... faulty memory.. arrrg...
( Running on 1.5 cylinders
Running on 1.5 cylinders
The motor has been running rough for while (2 seasons at least). Put in a new CDI, new spark plug wires (via jetskisolutions.com... great job!), new spark plugs. 4.2 k-ohms between boots as expected. Running a little better, but still rough. I pulled one boot from the plug, and runs similar. Can...
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Jcary85
Site Supporter
- Location
- Glenmoore pa
Also, maybe the stator plate has moved causing very retarded or advanced timing.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Compression is measured from the top of pistons at BDC up to TDC. Bottom of pistons has no effect on Compression
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