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Can you help me out here? I am having trouble understanding "just freewheels". When you write "engages fully", do you mean that the pinion gear is all the way into the teeth of flywheel? Or just that it moves to the flywheel? All the best, 2Pbfeet

Sorry to hear that you are still having issues. I feel your pain. As I mentioned earlier, I had a basically unnoticeable air leak on the inlet to the IP that gave me very similar overfueling grief. And, yes, I was pulling my hair out trying to figure out what the issue was, too. The only fix was...

That's a bummer to put it mildly. Alternators aren't exactly rocket science devices.

I would point out that the Yanmar L70 has a specification of a 19:1 compression ratio, so that might be an ideal value rather than an expected number. (19+1 atmospheres=294psia) I would call anything over 275psi good. All the best, 2Pbfeet

My $0.02 would be to buy the Harbor Freight tester and a cheap Yanmar clone injector, and pull the insides. I would not want to waste a known good Yanmar injector on a compression tester, but that's me. YMMV...

I found a reference in a TB 11-6115-741-24 that says the minimum compression for an '831 is 284psi.

I've had relays where the solenoid or the fulcrum was sticky, and as the relay cooled off they became stuck. Plus a couple that the contacts were micro welding themselves stuck intermittently (clean, polish and add a tiny film of conductive dielectric grease). Not much to do besides replace or...

Yanmar lists a special tool, TOL-97190060, but I can't find a compression number or a procedure in any of the Yanmar technical or service manuals that I have. The tool seems to be readily available online from several vendors, but not inexpensive. Also mentioned in a thread by...

I think of it as how the bolt could loosen in "righty righty, lefty loosely" and do the wire tension from there, but it is the same end result. One of the videos I looked at from a turbine tech ("Jet Tech") wrapped the "backside" wire around the bolt and under the primary wire and then used a...

I found several! Many with conflicting advice on what the FAA supposedly requires, which is fortunately not an issue for me, but lots of good suggestions on technique. Thanks. All the best, 2Pbfeet

Yes to #1, and #2, though for sure not enough practice! #3: I thought that I did ask a pro.;) And yes, I probably should just hang out at the local aviation watering hole. and, yes, I have several different diameter wires. It probably says something that I find the results aesthetically...

Any tips for us amateurs?

@Mr4btTahoe Are you sure that your fuel isn't gelling?

This is all I can see on the above photo. Looks more like a board and rev number than a part number to me.

The E1074 is an Airtex pump.

Thanks @kloppk for posting the link. That is one odd switch wiring. @BrnH2ORat Make sure you check the datasheet. The Honeywell switch turns off both of the contacts at one end, diagonal on in the middle, and the other contact off at the other end. Check page four of the datasheet...

In my Yanmar manual the illustration is for the dipstick just resting at the threads, I.e. not screwed in, the L100 Yanmar part number is 114699-01760. I don't know if it crosses over to the L70, but I believe the same cap was used on all L-series engines. Available on e-bay for about $10, or...

Oh, yes. Low compression would result in a less than ideal combustion, and therefore further over fueling as the governor advances the fuel lever at the high pressure pump. However, and it is a big however, those washers are notoriously difficult to see at the bottom of the injector tunnel...

Great point! These wires are tough but sharp edges and wires are never a great combination in my experience. There is a similar edge on the '803s as well, IIRC. I remember adding some additional wire management in that area on mine to get wires up and away from an edge. All the best, 2Pbfeet

@Toolslinger that all sounds as if you are making great progress. Good luck in getting the unit back up to full service! All the best, 2Pbfeet