1997 Euroline Cyclone

[dkeyes0814]

I just bought a 1997 cyclone jet boat with a 90hp 2 stroke and am having problems. Got it on the lake and it was very very slow even with throttle all the way open, an alarm started going off, im guessing that it is an overheating alarm because the engine was super hot and smoking a little. After i shut it off and drifted for a while i tried starting it again and it will not start. Just need some troubleshooting tips on what to check. Thanks for the help!!

 

[biffdotorg]

Let us know what is in it for an engine, so we can point you to the proper resource. My guess that vintage is a Mercury SportJet, or possibly a Force powerhead. Photos work if you can't figure it out.

 

[Julian]

Google search came up with this for a Euroline Cyclone:

 

[dkeyes0814]

Thats the one! Looks just like mine. I've been trying to find info but i dont know much about 2 strokes so its been a struggle. Thanks in advance for any info!

 

[biffdotorg]

Good find, I saw others with the Mercury SportJet as well, in 120 and 175hp versions. I swear, everyone was making a small jetboat back in those days.

 

[dkeyes0814]

yea it looks super fun, but i may have bitten off more than i can chew lol i can work on engines but i have no idea where to start troubleshooting and have minimal tools

 

[Bilmon]

Don't have any first hand knowledge of those old Force Sportjets but your motor should be covered in this Boatinfo - Mercury Service Manual for 90-120hp SportJet

 

[QBoater519]

I just bought a 1997 cyclone jet boat with a 90hp 2 stroke and am having problems. Got it on the lake and it was very very slow even with throttle all the way open, an alarm started going off, im guessing that it is an overheating alarm because the engine was super hot and smoking a little. After i shut it off and drifted for a while i tried starting it again and it will not start. Just need some troubleshooting tips on what to check. Thanks for the help!!

Hi dkeyes0814,

Did you ever figure out the problem?

I have a 96 Euroline with a similar overheating issue but never took it out on the lake yet.
Ran it on the garden hose and it still has over heating issue.

I have checked compression, spark, fuel line, exhaust port. Rebuilt the pump and carbs.

Only thing left is a leak in the manifold gasket or cylinder gasket. Which is a bigger job to do.

Thanks for any updates or advice

 

[Scottintexas]

Hi dkeyes0814,

Did you ever figure out the problem?

dkyes0814 never signed back in after his original join date and 3 posts on Jul 12, 2019


when you run it on the garden hose is that water for the exhaust cooling ( engine has a sealed coolant liquid like a car) or for engine and exhaust

I might take the thermostat out and see if you see water passing through,
otherwise get an infrared thermometer to point at different locations on the engine to see if you can identify the hotspot,

 

[Ronnie]

Way late response here but I owned a 1997 euroline cyclone as my first “boat”. Mine had a 175hp mercury sport jet and pump. Don’t know what the op’s Alarm sounded like but when mine went off and my friends mercury outboard did the same the problem was low oil pressure in both instances.