Curious - Why do the AR / SX series of 190 seem faster than the FSH ??

[FSH 210 Sport]

- 30 gal tank
- Not sure
- mix of 87/93 octane marine fuel
- New plugs /full service in May... only 5 hrs on them. Boat only has 15ish hrs on it
- Salt and brackish

- Impeller/wear ring like new... only 15 hrs - no damage
- Gap is good
- perhaps

Thank you

Right on…

I assume you are mixing the 87/93 to get 91? Very respectfully submitted, according the owners manual your boat, a 1.8L NA engine requires 86 octane fuel. Running higher octane than what is specified will hurt your engine performance, less power and more internal heat. I mix 85 and 91 octane non ethanol fuel to get 86. I use this calculator.

Octane Mixture Calculator

Salt water is more dense than fresh water.. so if you are hunting for that extra few hundred rpms a properly pitched impeller will give you that. I‘m waiting on delivery of my high altitude impellers to get the rpms that I’m missing.

 

[2kwik4u]

Running higher octane than what is specified will hurt your engine performance, less power and more internal heat.

This is a pretty common misconception. Running a higher octane fuel won't hurt engine performance. Won't help either. Only thing it does is make your wallet a bit lighter than it would have otherwise. I can go into great detail on why if you like.

I run 87 octane pump gas. This is usually E10 (10% ethanol) fuel. If you can find some 87 Octane "rec gas", or ethanol free you would be well versed to do so, but I wouldn't go out of your way to do so.

 

[swatski]

The 1.8s N/A engines do not have knock sensors, TTBOMK. They actually run faster on regular 87 octnae

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[Riff Raft]

My USUAL fuel stop is 87 or 89 octane marine fuel... sometimes "on occasion" I find myself at the marine pump with 93 octane. But either way, I'm not intentionally mixing for octane... I'm fine with the marine 87 octane.

Anyone else running the Lucky 13 cone? If so, which spacer/combo works best on the 190 NA engines?

Thanks for all the input!