I have a completely stock WB1 w/61x. The cooling line under the battery popped off and before I realized it I had overheated the engine. It never quite went into limp mode, which I have had happen before. The heat sensor was clearly melted. I cut the heat sensor off, and spliced a known good one in with no change. Symptoms are it reving up fine out of the water, but it's down in power and will not rev out or plane in the water. I also noticed that the pisser is sputtering air with water. Is this a head gasket issue? I'm very good with electrical, spark, and carb stuff and engine health is a bit of a new area for me. The compression is solid on both holes. I've replaced the CDI and ignition coils recently and I'm reasonably confident those are not my issue. I have a new head gasket and i was planning to do that, 11ftlbs torque first pass 25 on second. Does this sound like head gasket? Am I missing anything else?
WB1 61x head gasket?
- Thread starter Goose
- Start date
Quinc
Buy a Superjet
- Location
- California
As a test you can pressure test the cooling. *Block off the line going into the manifold and any fittings on the head.
- Location
- Texas
Since the Engine severely overheated, the Aluminum Components such as the Cylinder Head and Crankcases may have warped. When it's running cold on the Trailer, the Mating Surfaces will be air-tight. As soon as it warms up, the gaps open up. and it loses Primary and Secondary Compression. The Exhaust-side Piston Ring Landings probably have collapsed also.
You need to disassemble and inspect the entire Engine. Rebuild with New Crank Seals and Gaskets. Maybe new Top End.
Basically, you cooked dat beotch.
You need to disassemble and inspect the entire Engine. Rebuild with New Crank Seals and Gaskets. Maybe new Top End.
Basically, you cooked dat beotch.
Right on. So, being new to this, but also understanding it a little bit....is there like a bottom end kit and a top end kit (I've seen 81mm top end kits) that I can rebuild it with. ...or am I needing to like find a shop to look at the cylinders and head for honing? Alwo, if I get it warm and then do a compression test, is this going to reveal more to me?Since the Engine severely overheated, the Aluminum Components such as the Cylinder Head and Crankcases may have warped. When it's running cold on the Trailer, the Mating Surfaces will be air-tight. As soon as it warms up, the gaps open up. and it loses Primary and Secondary Compression. The Exhaust-side Piston Ring Landings probably have collapsed also.
You need to disassemble and inspect the entire Engine. Rebuild with New Crank Seals and Gaskets. Maybe new Top End.
Basically, you cooked dat beotch.
bored&stroked
Urban redneck
- Location
- AZ
Air in cooling line is a clear head gasket. Could be from hard parts warpage, could just be a bad gasket. You can try slapping a new one in there and see what happens, or you can use this as an excuse to big bore it to 84mm and have it ported while its out.....
Ok sweet, I'm gonna slap one in that's the plan at the moment... But obviously I want to plan ahead for if that doesn't do the trick. I mean, I gotta find a shop that specializes in jet ski engines for all that right? I'm in SE Michigan. I'm down to up the power on this thing without losing a ton of reliability. I rode a WB1 with rival red pipe and that thing was awesome. Can't remember if it was a 61x or 62T.Air in cooling line is a clear head gasket. Could be from hard parts warpage, could just be a bad gasket. You can try slapping a new one in there and see what happens, or you can use this as an excuse to big bore it to 84mm and have it ported while its out.....
bored&stroked
Urban redneck
- Location
- AZ
2 strokes are finicky, if you really did collapse the ring land as JC mentioned and you keep running it, you could loose the piston eventually and kill more parts.
Quinc
Buy a Superjet
- Location
- California
Any machine shop can bore your cylinder for you and mill the top of it to make sure its flat. If you want porting done there are a few shops you can send it off too. For boring you can go up one piston size. From 81 to 82 or jump all the way to 84 for MAX POWA! However, that doesn't leave you anymore room for rebuild. @JetManiac can hook you up with everything you need.
Thank you so much! This is the kind of info I was looking for. That or someone in general who can just simplify the list of parts and steps to take. I'm fairly handy, just don't know what needs doing.
Quinc
Buy a Superjet
- Location
- California
Everything you need to know is here: https://www.x-h2o.com/forums/tech-faq.26/
Spend the time and read through the threads.
Spend the time and read through the threads.