You can remove the injector from the block. Turn it upside down, reconnect to the fuel pipe, turn the engine over until the injector starts to spray. Pop, pop, pop. Watch the spray pattern. It should be a clean, wide cone pattern, equally aerated, fine mist. This is a test you should do before you send it to a shop.
If you want to attempt to clean it yourself you can unscrew the 2 halves of the injector, remove the spring and valve needle. Clean all the pieces with something like carb cleaner, berrymans b12 chemtool, or toluine. You have to be careful not to scratch any of the internal components. A hardwood scraper can be fashioned or paint stir stick or tooth picks. When you satisfied, reassemble the same way it came apart. Re-test for spray pattern. Re-install. While you have the injectors out I like to test compression and clean the precombustion chambers. They can get pretty well covered with carbon which will make them harder and harder to remove. You'll probably want to replace the thin copper ring between the two halves. There's also a lead gasket and a copper foil disc which go between the injector and the precombustion chamber. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Yanmar 3HM35F Solomons, MD On Mar 31, 2017 10:06 PM, "Brent Driedger via CnC-List" < [email protected]> wrote: > Greetings all. > > The 1GM10 Yanmar on my 27 began to give me issues last summer. The usual > complaints, hard starting, ran well once it was going. I replaced the > filter in the fall and my next move is to replace the old fuel and clean > the tank. > But judging from the white smoke in the exhaust I'm thinking the injector > spray pattern is off and I'm getting some dripping. I'm planning to > extract and clean it or replace it. > Any tips from those who have done this would be appreciated. > > Brent Driedger > 27-5 > Wild Rover > Lake Winnipeg. > > Sent from my iPhone > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! >
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