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Vikingsailor
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200 Posts
Discussion Starter · #1 ·
The other day, I removed the thermostat on my Westerbeke 20B Two to test it and make sure the spare that was bought by (I assume) the PO was correct.

Well, the spare was completely different. The only thing I can say about it is that it's a genuine Westerbeke part.

So...not wanting to be left with no spare, I went online to order a new one.

(Sticker shock!) $60!!! and another $6.50 for the gasket. Give me a break!

In a state of shock, I stopped by my local Napa Auto Parts to see if they might have something that would work. Lo and behold, we found the exact same thermostat...and the grand total? $20. Oh...and I got some of the gasket material with the sticky back to make my own...that nearly broke me at $0.59.

To order would have set me back about $70 w/shipping.
Local Napa: $20.85 or so...

Now...does that seem right to you?

By the way, I am going to sell the other, wrong thermostat on eBay...figure I can come out ahead!
 

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Vikingsailor
Joined
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200 Posts
Discussion Starter · #5 ·
Your Westerbeke is a diesel engine, so make sure you got a thermostat for a diesel engine. As I'm sure you know, heat produced by diesel engines is measured in dBTUs (diesel BTUs) and should not be mixed with gBTUs (gasoline BTUs). The inferior thermostat you bought from the auto parts store will destroy your engine because:

1. It uses gBTUs, not dBTUs.

and

2. The box does not have a picture of a boat on it.

As to #2, above, The FCC does not allow a vendor to place a picture of a boat on any product unless it has gone through a rigorous testing qualification procedure and met the minimum MESPBP (Marine Engineering Standards for Picture of Boat on Product) standards.

I urge all boaters to only buy products with a picture of a boat on it, and pay no attention to those shoddy, non-boat products available everywhere at less than half cost.

Remember, sure it's expensive, but there's a picture of a boat!

Best Regards,

e

.::.
HA! Yeah...if I squint my eyes, and turn down the lights, I can kind of see a sort of abstract boat shape on the bag the thermostat came in...
 

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Vikingsailor
Joined
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200 Posts
Discussion Starter · #8 ·
Does the NAPA thermostat that happened to fit open at the same temperature as the OEM thermostat? Most marine thermostats for small diesels open at 160F, but automotive thermostats usually open at 180F - 210F, which is hotter than the factory usually specifies for a marine engine. Many marine thermostats are made from stainless steel because they're designed to be used in both fresh-water and raw-water cooled engines, while automotive thermostats don't need to be stainless because they're always used in an antifreeze coolant mix. When Westerbeke orders stainless steel thermostats with a lower temperature than standard automotive parts they can't order a couple of million like an automobile manufacturer can; they probably only need a couple of hundred, and therefore the manufacturer charges them a lot more to make them.
Yup...both are rated at 160F. A metallurgist might be able to tell the difference in the two...maybe. But to the eye, touch, feel, smell (ok, maybe not), they are identical. My primary concern was fit (size) and temp rating. Dead match...can't beat that.
 
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