I think it is too much difference in capacity and can overheat the engine. 20 mF is not a difficult value to find in any case 25 maximum.
So bad is to miss the value of a capacitor for an engine.
https://www.amazon.es/SODIAL-Condensador-funcionamiento-cilindro-alambre/dp/B00J2N2Q8K/ref=pd_sim_265_1 / 260-4682946-2002553? _encoding = UTF8 & pd_rd_i = B00J2N2Q8K & pd_rd_r = dd9ae425-3df8-11e9-9e54-fb287eac608c & pd_rd_w = LSmMW & pd_rd_wg = n4g9v & pf_rd_p = c5e8da29-5841-4f7b-8c21-cf8ed834359e & pf_rd_r = M1E5V09TB4T08ZYMF68T & psc = 1 & refrid = M1E5V09TB4T08ZYMF68T