www.iFourWinns.com

Hello,
Today was my first day out with my new to me 2000 H180 Fish & Ski with Johnson 150 OB. This is my first boat and learning a lot. I've looked around and can't find an answer, Where should the WOT RPM's be? Today at wide open, they were only @ 4100 on the tach. The prop on it is a 14 1/4 x 19 aluminum. Granted, the lake was pretty choppy so I couldn't get planed out well. But before the wife complained, it was at 45 on the GPS. For load, there was 2 adults, 2 teenagers, 1/2 tank of gas, cooler and our fishing gear.

This sound about right? Or should I look at a different prop?

The motor should turn close to 5000 rpms at WOT.

The 19" pitch prop is what Four Winns originally paired the boat/motor with.

45 mph with that load in less than ideal conditions seems about right.

I'd do a few more WOT runs in better conditions and a lighter load to see if the rpms are still low. If they are, get a new tach...

The motor has a 1.86:1 gear ratio and with a 19" pitch prop, it would need to turn a lot faster than 4100 rpms to get 45 mph. Assuming minimal prop slip it is probably turning right around 5000 rpm in reality.

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Current Operational Boats:
'04-Four Winns 180 Freedom 150 HP Evinrude
'72-Chris Craft Commander 31 Sedan Twin-350Qs

Roger that, thank you very much for the response. Hopefully this upcoming weekend will be better on the lake. Unfortunately, it's too far to give it a shot during the week.

Love the outboard my next boat will definitely have an outboard on the back and a self bailing hull.

Yay! Another H180 F&S with an outboard! We are catching up in numbers (slowly)!

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1999 180 Horizon OB Fisherman Pkg
2013 Grand Cherokee 4x4 w/ 5.7 Hemi
San Antonio, TX

FWIW I have an H170 F&S with a Johnson 115 OB. Came from the dealer with a 19 inch pitch prop. Never could get to target RPM. Now with 17 inch pitch I get right at 5000 at WOT. Top speed is totally the same (43mph) and I don't notice any difference in hole shot.

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99 Four Winns Horizon 170 Fish & Ski
00 Johnson 115 O/B

Thanks for the welcome. I'm loving the boat and real happy with the outboard. With this being a little older boat, is there any suggestions on anything I should look to fix before they break?

The gauges will break or read wrong. Plus you can't forget the goodies to install like a killer sound system, gps, vhf, etc

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1981 Columbia 8.7
2015 Yamaha FZR - 87mph - sold
2006 Yamaha GP1300R - sold
2003 Chaparral 215 SSI - sold
2009 Stingray 195CS - sold
2000 Four Winns H180 - sold
1976 O'day Daysailer II - sold
Rick's Four Winns H180 Mods/Upgrade Thread

Ric,

Thanks for the imput. It looks like my guages may need an update, at least the Tach anyway. What are a good but not too expensive gauge for the boat? Something that will go with the dash?

I finally got to get her out on a calm lake and run her. Ended up with 46 on the GPS at 5100 rpm. I'm pretty happy with that!!
But then this weekend it started acting strange. Anything over @3k rpm and the temp would drop to unreadable on the gauge and the engine alarm would go off. But if I dropped it to idle the temp would rise and alarm would turn off. Has a constant tell tale stream. So I'm confused.
Does anyone have any idea? Sensor maybe?