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Old 24-02-2014, 07:42   #16
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Join Date: Dec 2010
Location: Englewood, Ohio/Oak Harbor, Wa
Boat: catalina 27 & Windrose 20 Hunter 34
Posts: 202
Re: Hard to Start Yanmar in Cold Weather

Talked with #1 son and the compression and oil pressure were checked by the yard and the engine started right off in warmer days. Starts and runs fine after a short warmup. He motored from Anacortes to Oak Harbor with no apparent problems. After all the help here we ruled out ether and will try a more passive solution as recommended. Thanx again for all the suggestions.

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Old 24-02-2014, 08:44   #17
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Join Date: Dec 2009
Location: Salem, MA
Boat: Pearson 31
Posts: 535
Re: Hard to start Yanmar in cold weather

Originally Posted by Tbrad View Post
Thanx for the tips people. I'll relay them to my son. He's now the proud new Captain of the s/v Aundria Lynn.
And a proud new captain with a proud papa.

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Old 25-02-2014, 21:50   #18
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Join Date: Feb 2012
Location: Ireland, French canals/Med/Spain
Boat: Birchwood Centre Cockpit 33, Broom Shannon Class 42 flybridge.
Posts: 480
Re: Hard to Start Yanmar in Cold Weather

If you operate the engine in cold northern climates it's possible that the fuel in the fuel tank is summer fuel which won't help.
Oil company's put in additives during cold weather for this reason, you also can buy cold start additives to put in the tank.
For all diesel engines operating in sub zero temperatures add 30% of paraffin to the diesel(well mixed) and it will run quite happily. DO NOT add benzene/petrol.
If there's no preheat system I would buy myself a little gas blowtorch and taking the usual safety precautions, remove the air cleaner and direct the jet of hot air into the air intake(taking care not to burn anything while someone turns the engine over to start, open the throttle fully before cranking and close to fast tickover immediately it fires on all cylinders.
I wouldn't recommend cranking the engine over for long periods for reasons already mentioned but also because the starter motor will overheat and wear out prematurely.
You have also added another problem by emptying batteries which must then be recharged.
I hope this is helpful.

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