Light smoke from engines

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John&Ria
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Light smoke from engines

Postby John&Ria » Sat Mar 11, 2017 9:53 pm

Over the last couple of years our Yanmar diesels have started to produce light blue smoke (more at start, less when warmed up). The engines have 1400+ hours on them.

My mechanics tell me that the smoking is the result of aging injectors, but nothing to be concerned about yet. I have head that diesel additives such as Stanadyne Performance Formula can help the injectors do there job and thereby reduce smoking, as well as improve overall performance and mileage (or so it is claimed).

I believe I will give this a try this season, but am curious if other PDQ owners have had success with Stanadyne or similar products.

Thanks for any input.....

John

Gusto
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Re: Light smoke from engines

Postby Gusto » Sun Mar 26, 2017 11:11 am

Have you had your injectors serviced? We do it every 1000 hours. Also, we use an additive called DEE-ZOL distributed by Mastry Marine, the Yanmar distributer in St Petersburg. We have 2500 hours on the engines and get a slight white smoke at startup, but none after that.

Bob MacNeill
Gusto 34#83/100 hp

John&Ria
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Re: Light smoke from engines

Postby John&Ria » Sun Mar 26, 2017 2:07 pm

Thanks for your reply Bob.

Yes, we did have the injectors serviced and tested at 1140 hours, as per the Yanmar operation manual (at a large boatyard in the Bahamas, which is another story). Interestingly, it was later that season when light smoke first appeared.

It certainly looks like your injectors are performing better than mine. I believe DEE-ZOL is quite similar in its performance claims to the Stanadyne product that I'm testing. Have you seen other benefits from this product, e.g. better mileage etc.?

John

Gusto
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Re: Light smoke from engines

Postby Gusto » Sun Mar 26, 2017 3:01 pm

Hi John,
Can't say if we noticed any difference because we have been using it since we bought the boat. We buy all our filters and parts from Mastry. They highly recommended the DEE-Zoll so we haven't tried anything else.
Bob

John&Ria
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Re: Light smoke from engines

Postby John&Ria » Sun Mar 26, 2017 4:44 pm

I'll see what benefits I get from the Stanadyne product - it's already in the tank and we're just starting our cruising season up here - and then maybe try DEE-ZOl for comparison purposes.

Thanks again for sharing your experience.

John


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