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Yanmar 315 WOT

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peacock
Swabby
Swabby
Posts: 3
Joined: Tue Aug 13, 2024 8:59 am
Home Port: Punta Gorda, Florida

Yanmar 315 WOT

Post by peacock »

We have just purchased a 2000 28TE with Yanmar 315. WOT is showing 4550 RPM and 20 knts. Has 19x17 cupped prop. RPMs seem high but it might be the gauge. Any suggestions.
Nancy
Gold Member
Gold Member
Posts: 1913
Joined: Thu Apr 23, 2009 8:41 pm
Home Port: Lake Champlain

Re: Yanmar 315 WOT

Post by Nancy »

Welcome aboard and congratulations!

The problem could very well be the tachometer. The simplest thing would be to check WOT with a digital tachometer. It's kind of fun and they're not expensive. We got this one in 2014, and omg, the price is lower now! https://www.amazon.com/gp/product/B001N4QY66/ When does that happen??

You might also want to check the dip switches on the tach to make sure they're set properly. The tach on our 35CB read quite high, and I eventually discovered that the dip switches were set totally wrong.
Nancy
2005 Albin 35CB
Yanmar 6LYA-STP 370
Valentine

Former boats
1995 Albin 28TE, Cummins 6BTA5.9 250, 2012-2022
1978 Trojan F32, 1998-2012
1983 Grady White 241 Weekender, 1988-1997
1980 Wellcraft 192 Classic, 1983-1987
Jkraft
Gold Member
Gold Member
Posts: 522
Joined: Mon Aug 26, 2019 9:22 pm
Home Port: Chestertown, MD

Re: Yanmar 315 WOT

Post by Jkraft »

That’s definitely off and based on your speed it’s not accurate. Check the wires on the sender first and clean those connections. On the te model its port side in the front of the motor (the side of the engine closest to the bow)
USCG 100 Ton Master

Current boat:
"New Classic"
2006 31TE / Hull# 221
Cummins QSC 8.3 / 500 hp

Previous boats:
2002 28 TE with 315 Yanmar “Hair Of The Dog”
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