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Thermostat Thermostat 66M-12411-01-00

Satisfaction rating 5 out of 5 (33 Ratings)
$33.95
Save $5.90 (15%)
Ships Immediately

Last update: 120 days ago Update Now

Product Description

4-Stroke Application: F80, F100 (~00) 4-Stroke Application: F30, F40, F40A, F50, T50 4-Stroke Application: F60, T60, F70 4-Stroke Application: F9.9, T9.9, F15, F25, T25 4-Stroke Application: F2.5, F4, F4A, F6, F6A, F8, T8

Product Questions

There are no questions for this product. Ask a new question and receive an answer, directly from our support staff.

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T8 Yamaha

Purchasing was good, delivery and shipping was terrible. It was 2 over 2 weeks after the order was placed before my parts were even shipped to me.
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Very easy to find parts with your system. No guesswork. You're parts breakdown sheets are exelent.
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Yamaha 150

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fast ship !
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great place to get your boat parts
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Yamaha F60

Repair Difficulty
Easy
Repair Time
Less than 30 mins
This was my second order from Crowley Marine. Service staff were very helpful when placing my order. The parts were reasonably-priced for Yamaha replacement parts. The order arrived one day ahead of schedule and I was kept informed through email on when the order would arrive. I will use Crowley marine for all my Yamaha outboard parts. Art L.
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Problem fixed: Replaced thermostat

Removed two bolts holding thermostat housing. Removed housing, gasket, and thermostat. Replaced thermostat ensuring it was properly installed. Installed new gasket, housing cover and the two bolts ensuring not to over tighten the bolts.

great shipping was fast
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I have purchased many times from Crowley marine. There website is extremely simple to use and navigate. If there is a possible question on related part there service department is extremely helpful. Shipping Is lightning fast. Never had a bad experience. Highly recommend this vendor. Will purchase in future.
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I received everything but not in a timely fashion shipping is very slow.
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good
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Excellent good product and pricing timely communication and shipping will buy from you again
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had to wait a little while for some items to come in,, but overall satisfaction was excellent
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2003 Yamaha f9.9mshb

Repair Difficulty
Easy
Repair Time
1 to 2 hours
Items showed in stock but I was told when I ordered it would be 2 weeks because items were out of stock.
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Problem fixed: Tune up

Tune up.

Very helpful when inquiring about orders.
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Yamaha

Repair Difficulty
Easy
Repair Time
2 to 4 hours
My experience was excellent and I would definitely buy from this store again. I received all the items that I ordered and they were packed and shipped well.
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Problem fixed: Wasn't passing water through or stay running

Changed the impeller, water pump and cleaned out the carburetor.

Yamaha F60

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Perfect. Great website - easy to make purchases.
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2013 Yamaha f50

Repair Difficulty
Easy
Repair Time
1 to 2 hours
The site was easy to navigate. The parts where OEM parts. Prices where a little higher than some other sites. But I purchased The part here.
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My experience was very good they answered all my questions
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Order was complete. I will order again from Crowley Marine.
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Super as always. Crowley is my go to place for all my outboard engine parts.
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Yamaha 4HP 4-Stroke

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Great, fast shipping with good quality OEM parts.
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Problem fixed: Water constantly flowing out of coolant output tube

I removed the engine cover. Then found the thermostat housing on the side and removed the 3 10mm hex bolts. Next I used a dead blow to break the housing seal and PPP the cover off. Then I was able to remove the thermostat and found it was stuck open. While I was there I also replaced the anode which is on the housing with a Phillips head screw. I replaced the gasket and inserted the new thermostat into the housing and reinstalled the thermostat housing.

1999 Yamaha 25HP boat motor

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Yamaha F80

Repair Difficulty
Professional
Repair Time
More than 4 hours
Excellent
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Problem fixed: Flames

It's a little known fact that the insulation on the rectifiers on F series Yamaha four stroke outboards has a tendency to break down after several years. http://continuouswave.com/ubb/Forum6/HTML/002114.html The resulting dead short has no fuse and if undiscovered will glow white hot until the rectifier catches fire. Because the rectifier is right next to the cd ignition black box this also can catch fire, along with the plastic of the air intake muffler. That's pretty much a thousand dollars in parts right there, assuming you've found the problem before the engine blows up and solves all your earthly problems. In the event that you are lucky enough to survive the fire you will find that your earthly problems have increased dramatically. I doubt whether any other mail order firm on the planet would put up with the dithering by me which accompanied identifying and sourcing all the parts required to repair the engine. Their patience was saintly as I chopped and changed my order until I had finally worked out everything I needed. After replacing the rectifier, the cd ignition and the air intake, the carburettors needed servicing, a job that I am now aware should be done on an annual basis. I now know more about F series Yamaha than I ever wished to learn.

Product Fitment Grid

This guide is to be used as a reference only. You must verify fitment using your model or serial number.

BRAND MODEL 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Yamaha International 4hp - - - - - - - - - - - - - x x x x x x x - - - - - - - - - - - - -
Yamaha International 6hp - - - - - - - - - - - - - - - x x x x x - - - - - - - - - - - - -
Yamaha International 8hp x x x x x x x x x x x x x - x x x x x x - - - - - - - - - - - - -
Yamaha International 9.9hp x x x x x x x x x x x x x x x x x x x x x x x - - - - - - - - - -
Yamaha International 13.5hp - - - - - - - - - - - - - - - - - x x x - - - - - - - - - - - - -
Yamaha International 15hp - - - - - - - - - - - - - x x x x x x x - - - - - - - - - - - - -
Yamaha International 20hp - - - - - - - - - - - - - x - - - - x x x x x x x - x x x x x x x
Yamaha International 25(20)hp - - - - - - - - - - - - - - - - - - x - - - - - - - - - - - - - -
Yamaha International 25hp - - - - - - - - - - - - - x x x x x x x x x x x x x x x x x x x x
Yamaha International 30hp - - - - - - - - - - - - - - - - x x x x x x x x x x x x x x x x x
Yamaha International 40hp - - - - - - - - - - - - - x x x x x x x x x x x x x x x x x x x x
Yamaha International 45hp - - - - - - - - - - - x x - x - - - - - - - - - - - - - - - - - -
Yamaha International 50hp - - - - - - - - - - x x x x x x x x x x x x x x x x x x x x x x x
Yamaha International 60hp - - - - - - - - - - - - - - - - - x x x x x x x x x x x x x x x x
Yamaha International 70hp - - - - - - - - - - - - - - - - - - - - - - - - - - x x x x x x x
Yamaha International 80hp - - - - - - - - - - - - - - x x - - - - - - - - - - - - - - - - -
Yamaha International 100hp - - - - - - - - - - - - - - x x - - - - - - - - - - - - - - - - -
Yamaha International WH - - - - - - - - - - - - - - - - - - x - - - - - - - - - - - - - -
Yamaha Outboard 4hp - - - - - - - - - - - - - - x x x x x x - - - - - - - - - - - - -
Yamaha Outboard 6hp - - - - - - - - - - - - - - - - x x x x - - - - - - - - - - - - -
Yamaha Outboard 8hp - - - - - - - - - - - - - - - - x x x x - - - - - - - - - - - - -
Yamaha Outboard 9.9hp x x x x x x x x x x x x x x x x x x x x x - - - - - - - - - - - -
Yamaha Outboard 15hp - - - - - - - - - - - - - x x x x x x x - - - - - - - - - - - - -
Yamaha Outboard 25hp - - - - - - - - - - - - - x x x x x x x x x - - x x x x x x - - -
Yamaha Outboard 30hp - - - - - - - - - - - - - - - - x x x x x - - - - - - - x x - - -
Yamaha Outboard 40hp - - - - - - - - - - - - - - x x x x x x x x x x x x x x x x - - -
Yamaha Outboard 50hp - - - - - - - - - - x x x x x x x x x x x x x x x x x x x x - - -
Yamaha Outboard 60hp - - - - - - - - - - - - - - - - - x x x x x x x x x x x x x - - -
Yamaha Outboard 70hp - - - - - - - - - - - - - - - - - - - - - - - - - x x x x x - - -
Yamaha Outboard 80hp - - - - - - - - - - - - - - x x - - - - - - - - - - - - - - - - -
Yamaha Outboard 100hp - - - - - - - - - - - - - - x x - - - - - - - - - - - - - - - - -

Customers Also purchased

Parts included in this kit

Please note: Some of the included items may not be available for purchase separately and won't be listed here.

Name SKU Price Brand
Thermostat Seal 688-12412-00-00 Yamaha Marine

Supersession Chain

Name SKU Superceding SKU
Thermostat VIEWING THIS PRODUCT 66M-12411-01-00 CURRENT
Thermostat 6G8-12411-03-00 66M-12411-01-00
Thermostat 66M-12411-00-00 66M-12411-01-00
Thermostat 6G8-12411-02-00 6G8-12411-03-00
6G8-12411-02-00 6G8-12411-01-00 6G8-12411-02-00
THERMOSTAT 6G8-12411-00-00 6G8-12411-01-00

Aftermarket Product Interchange

Name SKU Price Brand
Thermostat 18-3541 $43.99 Sierra Marine

Flat $3.95 Shipping on ALL parts orders

We offer shipping flat $3.95 shipping on ALL parts orders. (Complete Engines, Lower Units and Sterndrives excluded). In addition orders over $89 have reduced cost express shipping available in checkout.

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