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Hphoyt
Last seen: 1 week 2 days ago
Joined: 8/16/17
Posts: 3
Hot water heater time

How long should it take to make hot water at anchor at 1000 rpms. 70 degree temperatures? After 1 hour I get about 80 degrees. Lines are hot going in and out of hot water heater. Engine temperature 165. Thanks, Peter 
Catalina 36 1994

Catboat Willy
Last seen: 2 hours 46 min ago
Joined: 12/22/14
Posts: 176

Peter;'
 You don't really say where you are but I would imagine you should develop more heat than 80 F after an hour of running at idle regardless of where you are located. I certainly think that your engine would come up to operating temperature after one hour of operation in the idle mode.
You might try measuring the actual temperature of the engine with a hand held heat sensor and understanding the difference in temperature between the actual engine temperature and the output from the water heater. If there is a significant difference, it probably time for a new heater and or new hoses. Most water heaters in my salt water neighborhood (south Florida) last 6-7 years. We put one in two years ago and it was a snap to do. (About $500.00)

Most water heaters have a drain valve equipped on them and that might be a good spot to sample the temperature of the water. If it's 165F at that point, then you have either a blockage in a hose (Check the pressure and flow) or in one of the metal heater connections. Does it exhibit the same charteristics when you operate from dock side power at 110 volts ?
Good luck with it.

--
Bill Dolan 1990 Catalina C-36 MKI - Hull #1041  'Williwaw'
Std. Rig, Walk Through, Wing Keel
M35, Oberdorfer Conversion,
Home Waters; SW Florida
'You are never out of work if you own a boat'

 
Hphoyt
Last seen: 1 week 2 days ago
Joined: 8/16/17
Posts: 3

Thanks, Bill. We are in Sarasota for a month, than heading south to the keys, I’m guessing water temperature here to be in low 70 range.
Just noticed previous hose installer must have had extra hose and made a 1 foot loop above heater on both inlet and outlet, will get rid of that unless it is there for a reason. Thanks, Peter

Catboat Willy
Last seen: 2 hours 46 min ago
Joined: 12/22/14
Posts: 176

Peter.... sent you a personal message here on the forum. Look under the 'My Account' at the top of the home web page under 'Messages'
Bill

--
Bill Dolan 1990 Catalina C-36 MKI - Hull #1041  'Williwaw'
Std. Rig, Walk Through, Wing Keel
M35, Oberdorfer Conversion,
Home Waters; SW Florida
'You are never out of work if you own a boat'

 
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