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Lycoming, Jabiru and Rotax fuel pump covers
Fuel injector Mounting
Lycoming Parallel Valve Engines
On these, you are usually supplied with our dedicated injector mounting system which mounts the EFI
injectors directly into the existing 1/8 NPT injector holes on the top of the heads. These use a special
high strength stainless steel lower portion for low heat transfer and a floating 7075T6 bolting flange to
hold the injector cap in place. We fit a stainless steel body injector for maximum temperature resistance.
To mount these, remove the 1/8 NPT plugs from the injector ports (heat may be required). Slide the gold
flange over the lower silver adapter from below. Apply Loctite 246 to the threads on the silver part and
thread by hand into the injector port. Thread in until finger tight then tighten 1 ½ more turns. You should
get about 4.5 turns of thread engagement. Be careful here, stripping the threads will be a very expensive
exercise! Lubricate the lower injector O-ring and slide the injector into the adapter. Rotate the injector so
that the electrical plug faces towards the spark plug. Lubricate the upper O-ring and slide the gold cap
over the injector. Apply Loctite 246 on the two 8/32 Stainless socket head cap screws as shown above
and tighten in place. Only Loctite 246 is acceptable.
We supply/ recommend –3 Stainless steel braided hoses to join the injector tops to the fuel blocks. The
top cap is threaded 1/8 NPT female. Apply pipe sealant (not Teflon tape) sparingly to the fitting (either
steel or aluminum) only, making sure not to get sealant on the first thread. Screw the fittings in at
least a ½ turn past finger tight to get it orientated towards the fuel block fittings. Never turn the fitting
backwards once you start screwing it in. Tighten the braided line swivel fitting in place being sure that
they do not touch any other parts and are supported from vibration at least on one point. The upper gold
parts should not rotate on the lower hex with hard hand pressure.
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