[C320-list] Perkins M30 Engine Fuel Injectors

[Dave Hupe via C320-list]

Hi Everyone-
I don't have a "problem" with my 1993/4 Perkins M30 injectors but suspect they should be replaced or serviced. I have never done anything with them since buying our boat in 2017 and don't know the history before me regarding them. I always add Diesel Kleen with new fuel which I understand helps keep injectors clean.  However, I replaced my engine mounts this past year and aligned my shaft which reduced some engine vibration. Then I "pegged" my throttle and eventually got some smoke (black) at the highest speed which makes me wonder about my injectors. Normally I run at about 2500 rpm and get +6 knots easily, so I don't push it harder.
I know I can remove and get my existing injectors checked/serviced locally.  It is possible I could get away with a low service cost that way (but also could get hit with parts costs). Parts4Engines in United Kingdom offers complete new injectors at $81 each https://parts4engines.com/en-us/collections/perkins-perama-m30-parts/products/perkins-m30-injector   or just a replacement nozzle at $77 each https://parts4engines.com/en-us/collections/perkins-perama-m30-parts/products/perkins-perama-m30-injector-nozzle   They say that the nozzle is the only wearing component so replacing only it can reduce cost.  However, the nozzle alone used to be priced a good bit less, so the difference now doesn't seem to make sense (seems like I should buy the full nozzles instead (only $12 more for 3 injectors). 
Does anyone have direct experience replacing M30 injectors themselves ..... any advice about the way to go????
Thanks, Dave Hupe  1994 C320 #32
Holland, MI

[Dan Winsor via C320-list]

Hi Dave, just did it last fall. Straight up ez, just use two wrenches on
fuel connections. Bought the 3 pack of Perkins label injectors. Started
right up but ill have to tell you next summer.
One of the very few boat jobs that took less time than expected and left me
whistling.

[Bill Culbertson via C320-list]

Catalina Associations have always been independent but loosely connected to Catalina Yachts.  We have been supported and encouraged by Catalina Yachts.  But now in the aftermath of Michael Reardon's carnage, this loose connection is more important than ever.  
Our C320 Association remains strong, independent, and thriving, We have no intention of changing that.  
Bill CulbertsonC320IA Secretary/TreasurerHarmony #859

[Dave Hupe via C320-list]

Excellent!  A great thing.....
Dave Hupe
1994 C320 #33

Yahoo Mail: Search, Organize, Conquer

On Wed, Feb 4, 2026 at 5:03 PM, Bill Culbertson via C320-list<c320...@lists.catalina320.com> wrote:   Catalina Associations have always been independent but loosely connected to Catalina Yachts.  We have been supported and encouraged by Catalina Yachts.  But now in the aftermath of Michael Reardon's carnage, this loose connection is more important than ever.