[C320-list] Perkins M30 Lift Pump, or ....

[Mark Seyler]

I replaced the exhaust elbow 2 years ago. It was heavily clogged, but I doubt that the replacement has clogged in less than 100 hrs since. 

Mark Seyler
S/V Reality 

Sent from my iPhone

> On Oct 28, 2018, at 10:32 AM, Jeff Smith <jeffreyssmith at live.com> wrote:
> 
> That was my thought. The previous owner of my boat described the exact same symptoms and he thought he had major problems. The exhaust elbow was completely clogged, so he replaced it and there haven't been any similar issues since we bought it.
> 
> Jeff
> S/V Sailmates
> 
> Sent from my BlackBerry 10 smartphone.
>  Original Message
> From: Guy Henry
> Sent: Sunday, October 28, 2018 11:24 AM
> To: C320-List at catalina320.com
> Reply To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Perkins M30 Lift Pump, or ....
> 
> 
> Has the exhaust elbow ever been replaced?
> 
> 
> 
> 
>> 
>>> On Sun, Oct 28, 2018 at 12:15 AM, Mark Seyler wrote:
>>> 
>>> The Perkins M30 on my 1995 #232 has started stalling at idle, running
>>> rough up to around 1500rpm, and blowing light gray or white smoke out
>>> of the exhaust. My first thought was to change the Racor and secondary
>>> filters, but that didn’t help. And when I was bleeding the system
>>> after changing the filters, it didn’t seem as though the manual lever
>>> on the mechanical lift pump was moving as much fuel as I expected. (I
>>> used the piston pump on top of the racor instead.)
>>> I’m wondering if the lift pump could be the source of the stalling and
>>> smoke. The engine starts quickly if I give it a little throttle, even
>>> after a stall. So I’m assuming it’s not loss of compression from the
>>> valves or rings. Does anyone have any other suggestions about
>>> diagnosing the possible cause, or advice about changing the lift pump?
>>> I never had a Diesel engine until I bought my C320.