monkeyhanger Posted September 10, 2022 Report Share Posted September 10, 2022 I have a reciprocating engine water pump on my JP2. I wish to replace the bevel drive gear, but although I have a marine engine manual, there is no mention of my type of water pump in it. Does anyone have any pics/ info/ advice on replacing the gear please? Link to comment Share on other sites More sharing options...
David Mack Posted September 10, 2022 Report Share Posted September 10, 2022 Some of the online JP manuals show the gear pump, some the reciprocating pump. Try this one: https://www.dropbox.com/s/kl0rgnygqy8bkgc/LISTER JP2 AND JP3MGR MARINE PROPULSION WORKSHOP AND PARTS MANUAL.PDF?dl=0 Link to comment Share on other sites More sharing options...
monkeyhanger Posted September 11, 2022 Author Report Share Posted September 11, 2022 (edited) Thanks for that info. That was a page which was not in my manual, although there are no pages missing. Strange! What I was concerned about was, as it is a bevel gear drive, do I need to be concerned with the positioning of the driven gear wheel relative to the drive wheel, i.e.might it need to be shimmed to adjust it, and how would I measure the correct amount, or is it just a straight swap? Edited September 11, 2022 by monkeyhanger Link to comment Share on other sites More sharing options...
RLWP Posted September 12, 2022 Report Share Posted September 12, 2022 21 hours ago, monkeyhanger said: Thanks for that info. That was a page which was not in my manual, although there are no pages missing. Strange! Not really. There are several versions of the JP manual to trap the unwary. The reprints we sell have the plunger pump added at the back Wait 'til you try and work out a part number... Richard Link to comment Share on other sites More sharing options...
monkeyhanger Posted September 13, 2022 Author Report Share Posted September 13, 2022 On 12/09/2022 at 08:28, RLWP said: Not really. There are several versions of the JP manual to trap the unwary. The reprints we sell have the plunger pump added at the back Wait 'til you try and work out a part number... Richard Luckily I've managed to purchase a NOS bevel gear. Now I need to make sure I'm doing the right things when fitting it. Link to comment Share on other sites More sharing options...
RLWP Posted September 14, 2022 Report Share Posted September 14, 2022 18 hours ago, monkeyhanger said: Luckily I've managed to purchase a NOS bevel gear. Now I need to make sure I'm doing the right things when fitting it. Indeed. If it's a Marine JP you are going to have to take the flywheel off, and when you refit the gear housing you must get the fuel pump timing right Richard Link to comment Share on other sites More sharing options...
monkeyhanger Posted September 15, 2022 Author Report Share Posted September 15, 2022 On 14/09/2022 at 08:39, RLWP said: Indeed. If it's a Marine JP you are going to have to take the flywheel off, and when you refit the gear housing you must get the fuel pump timing right Richard I'm not sure removing the flywheel and front cover is necessary. I bought the engine as a pile of bits and put it together over 30 years ago, so my memory may be a bit rusty, but I seem to remember that the water pump and its drive gear just bolt onto the side of the gear housing, and the fuel pump doesn't need to be involved. But, as I say, it was a long time ago and I'm happy to be corrected. (But not TOO happy, because if you're correct, I've got a bigger job than I'd bargained for on my hands) Link to comment Share on other sites More sharing options...
RLWP Posted September 16, 2022 Report Share Posted September 16, 2022 Apologies - you are right. I hadn't read the whole thread Link to comment Share on other sites More sharing options...
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