Re: repower

We have the 3GM30F/27 hp in Shamrock with aproximately
500 hours. Currently we have a bent shaft from
floatsam in the delt, it took a blade off; extended
damage to the transmission which now has a rough
bearing. Yanmars diesels 2GM/2GM30F/3GM30F are
relatively good engines as marine diesels go, like
most engine, they have their own short coming.

In particular, the Yanmars tend to shake loose the
banjo fuel fittings at the lift pump and secondary
fuel filters, develope timing cover leaks in less than
1,000 hours, go figure, the seawater pump mounting
bolts are also timing cover bolts, periodic impeller
replacement and belt adjustment caused this joint to
open and close, we have also had issues with front
crank, power take off (hand crank) seals leaking on
low hour engines. Noise levels are higher than on
comparable engines.

The Yanmar Hurth/Kensaki (sp) transmission is
definately a soft spot for yanmar, panic shifting from
reverse to forwary while the propeller is still
spinning in reverse, generates excessive loads which
tend to deform the output shaft forward bearing recess
in the transmission front cover; this causes the front
bearing race to spin in the cover, causing a growling
sound. Folding propellers also have a similar effect
long term as panic shifts.

Good news MER transmissions in Seattle, WA. has
developed a kit, ZF transmission, keyhole adapter and
drive plate to replace the Yanmar KM2P and KM3P
transmissions at lower cost than replacing the stock
Yanmar transmission.

In the Westerbeke line you might consider the 30B
THREE or the Universal M35B, we have good success with
these engines. Only problem recorded to date has been
a defective glow plug relay which caused the glow
plugs to cycle while the engine is running, the glow
plug automatic breaker to trip and the volt meter to
jump; easy warranty fix, only had two ocassions in
last 5 years.

With some of the installations, we have had some
difficulty in changing impellers or accessing oil
filters, non specific to BCC, remote oil filter
(mounted low) and speed seal solved these issues. It’s
not a perfect world, but we managed to work around
these issues.

Best horsepower selection thus far seems to be 3.5 hp
per ton of displacement, any more than this is just
carying unwanted weight and burning excess fuel. On
our last run with GPS from Alameda California to Half
Moon Bay, we ran at 6-6.5 kts, not a bad run with 27
hp and a 14,000 pound boat.

If you have a boat in the San Francisco Bay Area send
us an e-mail and we will be glad to give you current
Westerbeke/Universal engine pricing.

Marty Chin, BCC Shamrock
Bay Marine Diesel


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Meet the all-new My Yahoo! - Try it today!
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Sure do appreciate your well informed and thoughtful posts Marty.
Regards,
Jim
On Nov 22, 2004, at 6:33 PM, Marty Chin wrote:

We have the 3GM30F/27 hp in Shamrock with aproximately
500 hours. Currently we have a bent shaft from
floatsam in the delt, it took a blade off; extended
damage to the transmission which now has a rough
bearing. Yanmars diesels 2GM/2GM30F/3GM30F are
relatively good engines as marine diesels go, like
most engine, they have their own short coming.

In particular, the Yanmars tend to shake loose the
banjo fuel fittings at the lift pump and secondary
fuel filters, develope timing cover leaks in less than
1,000 hours, go figure, the seawater pump mounting
bolts are also timing cover bolts, periodic impeller
replacement and belt adjustment caused this joint to
open and close, we have also had issues with front
crank, power take off (hand crank) seals leaking on
low hour engines. Noise levels are higher than on
comparable engines.

The Yanmar Hurth/Kensaki (sp) transmission is
definately a soft spot for yanmar, panic shifting from
reverse to forwary while the propeller is still
spinning in reverse, generates excessive loads which
tend to deform the output shaft forward bearing recess
in the transmission front cover; this causes the front
bearing race to spin in the cover, causing a growling
sound. Folding propellers also have a similar effect
long term as panic shifts.

Good news MER transmissions in Seattle, WA. has
developed a kit, ZF transmission, keyhole adapter and
drive plate to replace the Yanmar KM2P and KM3P
transmissions at lower cost than replacing the stock
Yanmar transmission.

In the Westerbeke line you might consider the 30B
THREE or the Universal M35B, we have good success with
these engines. Only problem recorded to date has been
a defective glow plug relay which caused the glow
plugs to cycle while the engine is running, the glow
plug automatic breaker to trip and the volt meter to
jump; easy warranty fix, only had two ocassions in
last 5 years.

With some of the installations, we have had some
difficulty in changing impellers or accessing oil
filters, non specific to BCC, remote oil filter
(mounted low) and speed seal solved these issues. It’s
not a perfect world, but we managed to work around
these issues.

Best horsepower selection thus far seems to be 3.5 hp
per ton of displacement, any more than this is just
carying unwanted weight and burning excess fuel. On
our last run with GPS from Alameda California to Half
Moon Bay, we ran at 6-6.5 kts, not a bad run with 27
hp and a 14,000 pound boat.

If you have a boat in the San Francisco Bay Area send
us an e-mail and we will be glad to give you current
Westerbeke/Universal engine pricing.

Marty Chin, BCC Shamrock
Bay Marine Diesel


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Meet the all-new My Yahoo! - Try it today!
http://my.yahoo.com

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That was a great post. Save it.

Thanks
Bob

Marty Chin wrote:

We have the 3GM30F/27 hp in Shamrock with aproximately
500 hours. Currently we have a bent shaft from
floatsam in the delt, it took a blade off; extended
damage to the transmission which now has a rough
bearing. Yanmars diesels 2GM/2GM30F/3GM30F are
relatively good engines as marine diesels go, like
most engine, they have their own short coming.

In particular, the Yanmars tend to shake loose the
banjo fuel fittings at the lift pump and secondary
fuel filters, develope timing cover leaks in less than
1,000 hours, go figure, the seawater pump mounting
bolts are also timing cover bolts, periodic impeller
replacement and belt adjustment caused this joint to
open and close, we have also had issues with front
crank, power take off (hand crank) seals leaking on
low hour engines. Noise levels are higher than on
comparable engines.

The Yanmar Hurth/Kensaki (sp) transmission is
definately a soft spot for yanmar, panic shifting from
reverse to forwary while the propeller is still
spinning in reverse, generates excessive loads which
tend to deform the output shaft forward bearing recess
in the transmission front cover; this causes the front
bearing race to spin in the cover, causing a growling
sound. Folding propellers also have a similar effect
long term as panic shifts.

Good news MER transmissions in Seattle, WA. has
developed a kit, ZF transmission, keyhole adapter and
drive plate to replace the Yanmar KM2P and KM3P
transmissions at lower cost than replacing the stock
Yanmar transmission.

In the Westerbeke line you might consider the 30B
THREE or the Universal M35B, we have good success with
these engines. Only problem recorded to date has been
a defective glow plug relay which caused the glow
plugs to cycle while the engine is running, the glow
plug automatic breaker to trip and the volt meter to
jump; easy warranty fix, only had two ocassions in
last 5 years.

With some of the installations, we have had some
difficulty in changing impellers or accessing oil
filters, non specific to BCC, remote oil filter
(mounted low) and speed seal solved these issues. It’s
not a perfect world, but we managed to work around
these issues.

Best horsepower selection thus far seems to be 3.5 hp
per ton of displacement, any more than this is just
carying unwanted weight and burning excess fuel. On
our last run with GPS from Alameda California to Half
Moon Bay, we ran at 6-6.5 kts, not a bad run with 27
hp and a 14,000 pound boat.

If you have a boat in the San Francisco Bay Area send
us an e-mail and we will be glad to give you current
Westerbeke/Universal engine pricing.

Marty Chin, BCC Shamrock
Bay Marine Diesel


Do you Yahoo!?
Meet the all-new My Yahoo! - Try it today!
http://my.yahoo.com

BRISTOL CHANNEL CUTTER OWNERS ASSOCIATION
Mail List Home: http://groups.yahoo.com/group/bcc
BCC Owners Home: http://www.geocities.com/bccowners
Post message: mailto:bcc@yahoogroups.com
Subscribe: mailto:bcc-subscribe@yahoogroups.com
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List owner: mailto:bcc-owner@yahoogroups.com

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