On May 26, 2022, at 2:16 PM, Ernie Bubb <erni...@gmail.com> wrote:
First some context. Having some difficulties with the Yanmar 3YM30 engine on my 2011 Catalina 355 — engine RPMs fluctuation. Yard maintenance assessed problem as injector pump, which I have had rebuilt. Still having difficulties which occur mostly at higher RPM (2500) but not at lower RPMs (1500). New primary and secondary fuel filters. Fuel appears clean in bowl of filter.
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On May 26, 2022, at 2:43 PM, 'Ken Kloeber' via Catalina355 <catal...@googlegroups.com> wrote:
The problem about fine primary filtering is that it will clog up before the secondary fiikter. In essence OEM filtering on a boat is a$$ backward. The first filter should be coarser than the final filter and most secondary filters (using published tested beta ratios) are rated at 20u - 30u “absolute”; lower values “nominal” efficiency.
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On May 26, 2022, at 2:58 PM, Ernie Bubb <erni...@gmail.com> wrote:
Thanks Ken -
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On May 26, 2022, at 3:54 PM, Michael <michael.h...@gmail.com> wrote:
Ernie,
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On May 26, 2022, at 5:34 PM, Ernie Bubb <erni...@gmail.com> wrote:
Thanks for answering. I hear the engine drop and also see the tack go down. At 2500 it drops maybe 300-400 RPMs then will recover then repeat a couple minutes later. It has never happened in neutral if I drop to 1500 then it is stable Since the injector pump was rebuilt it has only happened on the water under load, but I haven’t tested it at dock tied up under load. Planning to do that this weekend.
On May 26, 2022, at 5:34 PM, Ernie Bubb <erni...@gmail.com> wrote:
Thanks for answering. I hear the engine drop and also see the tack go down. At 2500 it drops maybe 300-400 RPMs then will recover then repeat a couple minutes later. It has never happened in neutral if I drop to 1500 then it is stable Since the injector pump was rebuilt it has only happened on the water under load, but I haven’t tested it at dock tied up under load. Planning to do that this weekend.
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On May 26, 2022, at 7:20 PM, Jeff Hare <Cata...@thehares.com> wrote:
Maybe, but there is a flaw in that logic. The engine filter is tiny and only intended for injector protection. It has very little surface area.
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On May 2, 2023, at 2:34 PM, Allen Barnes <allsai...@gmail.com> wrote:
My prior sailboat, C-350, was delivered with a Racor 500 fuel filter. My new 355 [#170] is not equipped with this type of filter.
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On May 2, 2023, at 3:43 PM, bill pittore <bill.p...@gmail.com> wrote:
I’d be curious to see what that filter looks like. On my boat (#77) it came with a Racor 230RMAM filter and I usually use the R20T elements which are 10 micron.
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On May 2, 2023, at 5:45 PM, Marvin Isgur <kir...@sbcglobal.net> wrote:
This is a 30 micron. It comes in a metal non removable cylinder
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On May 6, 2023, at 3:31 AM, David Everett <davidse...@gmail.com> wrote:
Hi Ernie - your engine's symptoms may also indicate that your exhaust elbow is almost blocked - it is prone to scale build up where the sea water enters the elbow. Its a recommended replacement part every 3 years or so. It eventually ends up 'strangling' the engine. (Learnt this the hard way!)
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