Bukh 20 Thermostat

[Guest]

I have a raw water cooled engine and have discovered that an 80 deg 'stat is fitted instead of the 60 deg which is normally installed. Norris Eng tell me the price is £47.

Does anyone have a potential cheaper source for these parts (Believe this 'stat is specially made for Bukhs)?



Robin C

 

[Guest]

From my expreiance all ancillary part for any engine is not specialized. If you take the thermostat to any good motor factors they will check their cataloges and find who makes it and supply cheaper that any MARINE suppier. Some times some part are non standard sized but its only a matter of finding the manufactuer. Volvo are bad for this but I've found a alot of parts from motor factors. Example;With your Bukh the temp sender is VDO and it's cheaper from VDO than Bukh.
Hope this helps you.

 

[vyv_cox]

I have tried unsuccessfully to find an alternative. I agree that there is usually some automotive alternative, but I have never succeeded in finding it. You may like to refer to a useful site http://www.btinternet.com/~inadee/bukh.htm He gives alternatives for many Bukh parts, but there seems to be nothing for thermostats.

 

[Stemar]

I think the problem with finding sensibly priced alternatives to marine thermostats is that automtive engines run at 90C+, while a raw water cooled engine shouldn't be running much above 60C, or the waterways get clogged up.

Putting a car thermostat in your raw water cooling system is likely to prove VERY expensive!

 

[vyv_cox]

It's not only a matter of the setting. The Bukh one is very small, nothing like the automotive ones that I am used to.

 

[Guest]

Robin,
You are doing well if you can purchase this thermostat from Norris Eng for £47.The price direct from Bukh is £45.80 + V A T.= £53.81.
I was interested to read your post as I have a Bukh 24, in a Westerly Fulmar, on which Ihave recently replaced the thermostat in an attempt to reduce the excessive steam ejected by the exhaust.I would be interested to know if this is your own experience - and particularly interested if you come up with an effective solution.

 

[vyv_cox]

Steaming Bukhs

Every Bukh 20 that I have known has steamed, regardless of the boat it was fitted to. This appears to be nothing to do with engine coolant temperature - mine never overheated but always steamed. I suspect the cause to be the relatively low coolant throughput of these engines. Steam is generated at the injection point into the exhaust, downstream of the engine, because flow is insufficient to cool the gases quickly. Other enginess generally have larger water pumps and much greater flows from the exhaust.