Thanks all for the discussion. I have been long puzzled about the HIO 360-A1A I have fitted to a Zlin 326. The previous owner - who since passed away - told me it was 200hp but everything I read tells me that it is 180, despite the higher rpm. It had the fuel injection before but it was not serviceable and apparently gave trouble so I have bought an Australian Rotec TBI system which is a bolt on replacement. I just had the engine inspected ( it hasn’t run in 18 years) and looking forward to getting it running
Look at the engine type certificate. 1E10
Model HIO-360-A1A,-A1B
RatingMaximum continuous, hp., r.p.m.full throttle at:Sea level pressure altitude 180-2900-S.L. to 3900
(What is this 3900 in the TC? Almost seems like a misprint. I've not seen an rpm this high on other Lycomings)
Compression Ratio 8.7:1
Bore and stroke, in. 5.125 x 4.375
Model IO-360-A1A, -A1B
Maximum continuous, hp., r.p.m. full throttle at: Sea level pressure altitude 200-2700-S.L
Compression Ratio 8.7:1
Bore and stroke, in. 5.125 x 4.375
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There is something interesting about the information published in the TC.
The HIO- is rated at only 180 hp at 2900 rpm + ??
The IO- is rated at 200 hp at the lower 2700 rpm.
Both engines have the same Compression Ratio and Bore and stroke. This doesn't make sense. The higher rpm should show a higher hp.
This is NOTE 8 of the TC. HIO-360-A1A Similar to IO-360-A1A except has Bendix RSA-5AB1 fuel injector, Bendix S4LN200 magnetos. No provisions for propeller governor drive.
This NOTE 8 is telling me there is a misprint in the TC. I suggest the HIO-360-A1A which you have is really rated at 200 hp. What does it say on the data plate?