PurposeThe objective of this article is to empirically study the influence of the characteristics of small- and medium-sized enterprises (SMEs) in the processes of knowledge creation, knowledge transfer and innovation in conjunction with the utilisation of private and public knowledge (KM) in accordance with the “spinner innovation model” (SIM).Design/methodology/approachThe article deploys a sample of primary data generated by a questionnaire applied to the managers of hotel SMEs in Portugal. This involved the application of the covariance and multiple regression analytical methods.FindingsThe results demonstrate that some of the SME characteristics return significant impacts on private and public KM: the processes of knowledge creation, transfers of knowledge and innovation. The results also identify how private KM statistically predicts the processes of knowledge creation and transfer and innovation while public KM shapes and influences the creation of knowledge.Research limitations/implicationsAs with any other such study, the key limitation stems from the sample made up of 82 hotel directors, which represents only a low rate of response even though the project deployed all of the procedures available to avoid such an outcome.Practical implicationsThe SIM approach to the innovation process may assist strategic decision-makers to improve their tools and relations, avoid repeated working overlaps in existing processes as well as enabling more competitive approaches in terms of innovation.Social implicationsFurthermore, the responses ascertained reflect only the universe of study, conditioned by the context that produced them; hence, any generalisation of the results requires due caution.Originality/valueThis is the first study to empirically analyse the influence of the characteristics of SMEs over the processes of creating and transferring knowledge and innovation based upon applying the SIM and observing the extent of public and private knowledge in the hotel sector of Europe, more specifically, Portugal.