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Just some follow up and thanks to all who posted and helped. Got the plunger guide and delivery valve spacer from AMBAC (cost = $15.80 plus shipping) and reassembled IP this morning. Got back on genny and it fired right up. Sounds great and makes electricity. Yeah!!!

Thanks Chris. But, I went ahead and called AMBAC and caught them before they left. For $15.80 plus shipping have the plunger guide and spacer on the way.

Okay, got it all apart. Plunger was quite stuck but after a hot ATF bath (thanks GimpyRobb) and brass punch it freed up. To my surprise, the plunger guide was not broken. But, is is buggered up a little. Seems that the plunger succeeded in turning about 40 degrees in the guide which is where I...

Tried to attach pics to last post (twice) but didn't work. Gonna try again. As to plunger coming out the bottom, that seems to be what step #10 in the AMBAC manual instructed. Seemed that only its o-ring in the drive gear bore was holding it in. On your instruction to remove the fuel stop I...

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Upon closer inspection, I think that the plunger is indeed stuck in the spring compressed position. I had thought it was free because the tappet was free at the bottom. However, I think it was just free play in the bore. Looking from the top into the delivery valve hole the top of the plunger...

Update: finally got head separated from the body. I'm on step 12 from the AMBAC manual which is where the special tool and arbor press is called for. First question: it says "With plunger in its highest position"? I'm attaching a pic of how my pump is presented right now. I'm unclear here...

Okay, got it pulled and on bench. Didn't match diagram in the TM. But, finally found an online manual from AMBAC that does and proceeding. I'm at point of trying to get the hydraulic head seperated from the main body and having no luck yet. Manual says "in some instances, it may be necessary to...

Thanks for comment, Keith. So no matter how the pump is removed and irrespective of whether the engine crank is moved while IP is out or not I will still need to reinstall the pump with the alignment pin (1/8th" drill bit) in the pump and the crank aligned to PC of #1 compression stroke (either...

Hey Guys, just bought two trailer mounted MEP002's with ASK enclosures. Both appear to be in excellent condition. One I've started on shows 410 hours. Model year 1991. Fuel tank was about 3/4 full and smelled stale but not too gummy. Oil looked new and overfilled - an oddity later explained by...