Exhaust elbow

Oct 30, 2019
119
Why not buy a replacement elbow? The part is probably very cheap, such elbows in due course will erode and fail, this one has proven itself to be at or near the end of its life, it's a critical part, and you have it out anyway for goodness sakes!Nicholas H. Walsh P.A.
111 Commercial St.
Portland ME 04101
207/772-2191
Fax 207/774-3940

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From: Bob Carlisle
Sent: Monday, November 01, 2010 11:13 AM
To: AlbinVega@yahoogroups.com
Subject: Re: [AlbinVega] MD6A Injector removal?
Thanks for the replies/advice to last weeks query:

Whilst there are a few barnacles on the prop, there aren't enough to have this degree of effect.

Note the suggestion regarding renewing rings and re-grinding valves. This goes against my policy of disturbing the engine any more than I'm forced to, besides which, if the rings/bores were knackered, I would expect to have poor compression/starting and also more oil being thrown out of the exhaust? If the injector nozzle replacement doeasn't cure things, I may consider it at the end of next summer.

On this same basis, I'll see if the new injector nozzles improve things and if so I'll leave the fuel pump timing alone.

The heads-up on the exhaust elbow was very well timed, albeit indirectly; whilst we didn't have much carbon build up in there, having taken it off, we discovered that there was a pinhole almost burnt through the casting, which the acid we used completed; fortunately it's near the middle of the unit, so we can hopefully repair it using exhaust tape & epoxy. More seriously, we found that the morse throttle cable, where it passed behind the elbow had been rubbing on a metal bracket which had worn through the outer casing and part way through the cable too; so today I've replaced and re-routed it. Whilst neither problem was connected with my original enquiry, if I'd not taken off the elbow as suggested, the chances are that one or even both of them would've bitten us at a time when they might've caused us some serious grief. Thankyou!

Now its just the injectors, anyone got any good tips for removing them? The last/only time I've done them before, I simply disconnected the unions and hold-down nuts and levered them out with very little effort, using a couple of big screwdrivers; it took about tn minutes. I've learnt today that I was obviously lucky last time, because they won't budge at all this time. I've doused them with WD40 and given up for today, but any ideas on what else I can do will be gratefully recieved.

Bob Carlisle
Spring Fever 1776

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