POH book for my Skylark 175-B w/180hp conversion

POH book for my Skylark 175-B w/180hp conversion

I need to locate/purchase a POH book for my 1961 175-B Skylark.
It has been converted to a 180HP Lycoming w/ constant speed prop.
I need to know what the corrected weights and balance gross carry weight is now. All I have is the original owners book which states it is max weight at 2350Lbs. Its empty weight is 1509.3 with present avionics.
I find that with the present data in my owners book, that I am out of the weight & balance chart, (front heavy), when the pilot and a front seat passanger are aboard with even 42 gallons of fuel, never mind the full 52 gallons it can carry! Any help would be gratefully appreciated! Thanks, Bill Bowling, Sparta,Tennessee. 1-931-808-7245(cell)

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Re: POH book for my Skylark 175-B w/180hp conversion

When the airplane was converted to 180 hp, there should have been an FAA approved flight manual supplement inserted into the POH. This should have been verified at annual as the airplane is not airworthy without this information on board the airplane. I would contact the last IA that signed the airplane off and ask for an explanation as to where this info is... If you know, by the log entry, who did the conversion perhaps they would have copies that they could provide to you...

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Re: POH book for my Skylark 175-B w/180hp conversion

I have had two Cessna 175 conversions, and the STC holder does not send new numbers, both were Avcon conversions, and stay at the 2350 gross weight.  You are required to use air speed numbers that are in the orginal POH.  Since the conversion is better that those.  Over time I have established a new number for Take Off distance over a 50' tree.  Also installed a Angle of attack indicator, which gives me minimum controlable air speed, Best angle of climb air speed and best glide air speed.
Your weighing of the empty airplane, and the new weight and balance will nearly always put you at the forward limit of the CG.  I solved the problem, but putting weight in the tail (15 lbs)  This figured into the W&B, brought it into the CG.  A lot of A&P have a real hard time trying to figure this.

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