no, it is correct. It threw me at first too, but you're not turning the plunger, you're turning the barrell

@J M Here are some information to answer your question. With German Bosch Diesel fuel injection products, when they say P- they are talking about the size or the model of the injection pump. A few examples of injection pump with different sizes: M-size pump- 7mm plunger stroke, A-size pump- 8mm plunger stroke, B-size pump- 10mm plunger stroke, and P-size pump- also with 10mm plunger stroke. I also included some technical details for further distinction. All the best and stay safe and away from covid.

India, the home of the very famous brand of diesel fuel injection pumps, injectors and other fuel systems accessories, MICO!!!

It doesn't its a mechanical injection, it only ever injects a set specified time, the common rail ones can change injection timing.

@@CrazyForCooCooPuffs this is wroing

@Reno's Garage no I'm not, telling me I'm wr9ng with out a reason doesn't help.

@@CrazyForCooCooPuffsnot all mechanical injection pumps don’t have timing advance, for example the Bosch VE pump has a timing advance piston that advances the timing as the revs increase

Mack used them on the old 325 thermodyne v8’s, and I think some on some of the newer ones as well like the 866’s.

V8 pumps are probably used on V8 diesel engines

@@j.m.5995 no shit..... ya dont say!!...

@@americantruck3943 That's right I said it

I just bought one from a 9.0L international.

They still do. It’s the government requiring their customers to achieve certain goals that a mechanical pump can not deliver.

As Robert said, there are regulations for emissions and fuel economy that these older pumps cannot achieve. Modern pumps like the CP4 might not be as rugged or long-lasting, but they are lighter, more responsive and far more fuel efficient. Everything is a trade-off, in-line pumps have pros and cons, as do modern CR pumps.